RALSTON PURINA CO
11-K, 2000-06-28
GRAIN MILL PRODUCTS
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                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D. C. 20549






                                    FORM 11-K

                     ANNUAL REPORT PURSUANT TO SECTION 15(d)
                     OF THE SECURITIES EXCHANGE ACT OF 1934


                   For the Fiscal Year Ended December 31, 1999


                          Commission File Number 1-4582

                             RALSTON PURINA COMPANY
                             SAVINGS INVESTMENT PLAN







                              RALSTON PURINA COMPANY
                               CHECKERBOARD SQUARE
                             ST. LOUIS, MISSOURI  63164

<PAGE>

                        REPORT OF INDEPENDENT ACCOUNTANTS




To  the  Participants  and  the  Plan
Administrator  of  the  Ralston  Purina
Company  Savings  Investment  Plan

In  our  opinion,  the  accompanying  statement of net assets available for plan
benefits  and  the related statement of changes in net assets available for plan
benefits  present fairly, in all material respects, the net assets available for
plan  benefits of the Ralston Purina Company Savings Investment Plan at December
31, 1999 and 1998, and the changes in net assets available for plan benefits for
the  years  then  ended,  in  conformity  with  accounting  principles generally
accepted  in  the  United  States.  These  financial  statements  are  the
responsibility  of  the  Plan's  management; our responsibility is to express an
opinion  on  these  financial  statements  based on our audits. We conducted our
audits  of  these  statements  in  accordance  with auditing standards generally
accepted in the United States, which require that we plan and perform the audits
to  obtain  reasonable assurance about whether the financial statements are free
of material misstatement. An audit includes examining, on a test basis, evidence
supporting  the  amounts  and disclosures in the financial statements, assessing
the  accounting  principles  used  and  significant  estimates  made by the Plan
Administrator,  and evaluating the overall financial statement presentation.  We
believe  that  our  audits  provide a reasonable basis for the opinion expressed
above.

Our  audits  were  performed  for the purpose of forming an opinion on the basic
financial  statements  taken  as a whole. The supplemental schedules included in
Attachments  I  and II are presented for purposes of additional analysis and are
not  a  required  part  of  the basic financial statements but are supplementary
information  required  by  the  Department  of Labor's Rules and Regulations for
Reporting  and  Disclosure  under the Employee Retirement Income Security Act of
1974.  These  supplemental  schedules  are  the  responsibility  of  the  Plan's
management.  The  supplemental  schedules  have  been  subjected to the auditing
procedures  applied  in  the audit of the basic financial statements and, in our
opinion,  are  fairly  stated  in all material respects in relation to the basic
financial  statements  taken  as  a  whole.



/s/  PricewaterhouseCoopers  LLP
June  7,  2000

<PAGE>



<TABLE>
<CAPTION>

                              RALSTON PURINA COMPANY SAVINGS INVESTMENT PLAN

                            STATEMENT OF NET ASSETS AVAILABLE FOR PLAN BENEFITS
                                                DECEMBER 31
                                          (DOLLARS IN THOUSANDS)




                                                                           1999                     1998
                                                                           ----                     ----

<S>                                                                         <C>                       <C>
ASSETS

 INVESTMENTS, AT FAIR VALUE (NOTE 2)
    Short-term investments                                              $   2,188               $     603
    Shares in registered investment company                               139,468                 138,577
    Vanguard Index Trust - 500 Portfolio                                  115,837*                 83,664*
    Common stock-RAL Stock                                                483,603*                636,085*
    Common stock-Agribrands                                                     -                   2,720
    Notes receivable from participants                                     24,389                  29,354
                                                                        ---------                --------
     TOTAL INVESTMENTS                                                    765,485                 891,003

INSURANCE COMPANY CONTRACTS, AT CONTRACT VALUE (NOTE 2)                    43,844                  39,607

INTEREST AND DIVIDENDS RECEIVABLE                                              11                       2
                                                                         --------                --------

     TOTAL ASSETS                                                         809,340                 930,612

LIABILITIES
   Accrued plan expenses                                                      156                      45
                                                                         --------               ---------
     TOTAL LIABILITIES                                                        156                      45
                                                                        ---------               ---------


NET ASSETS AVAILABLE FOR PLAN BENEFITS                                   $809,184                $930,567
                                                                        =========                ========

See Notes to Financial Statements

*  Investment represents 5% or more of Plan's net assets.
</TABLE>


<PAGE>

<TABLE>
<CAPTION>

                 RALSTON PURINA COMPANY SAVINGS INVESTMENT PLAN

         STATEMENT OF CHANGES IN NET ASSETS AVAILABLE FOR PLAN BENEFITS
                         FOR THE YEAR ENDED DECEMBER 31
                             (DOLLARS IN THOUSANDS)




                                                       1999        1998
                                                      ----         ----

<S>                                                 <C>             <C>

ADDITIONS TO NET ASSETS ATTRIBUTED TO:
  Investment income                                 $  25,656   $ 36,497
  Net realized and unrealized gain in investments           -     76,986
                                                    ----------  --------
                                                       25,656    113,483

  Contributions
    Employer                                            4,263     23,884
    Employee                                           36,597     28,761
                                                    ----------  --------
                                                       40,860     52,645

  Other additions                                          76        116
                                                    ----------  --------

    TOTAL ADDITIONS                                    66,592    166,244
                                                    ----------  --------

DEDUCTIONS FROM NET ASSETS ATTRIBUTED TO:
  Net realized and unrealized loss in investments      70,718          -
  Benefits paid                                        65,601    120,240
  ESOP interest expense                                     -      3,219
  Administrative expenses                                 278        171
  Asset transfers out                                  51,378      6,177
                                                    ----------  --------
    TOTAL DEDUCTIONS                                  187,975    129,807
                                                    ----------  --------

Net Increase/(Decrease)                              (121,383)    36,437
                                                    ----------  --------

NET ASSETS AVAILABLE FOR PLAN BENEFITS
  Beginning of year                                   930,567    894,130
                                                    ----------  --------

  End of year                                       $ 809,184   $930,567
                                                    ==========  ========

See Notes to Financial Statements
</TABLE>

<PAGE>

                             RALSTON PURINA COMPANY
                             ----------------------
                             SAVINGS INVESTMENT PLAN
                             -----------------------

                          NOTES TO FINANCIAL STATEMENTS
                                DECEMBER 31, 1999




NOTE  1  -  DESCRIPTION  OF  THE  PLAN
--------------------------------------

The  following  is  a  summary description of the Ralston Purina Company Savings
Investment  Plan (the Plan) and provides only general information.  Participants
should  refer to the Plan document for a more complete description of the Plan's
provisions.

GENERAL  -  The Plan is a defined-contribution plan, established for the purpose
of  enabling  employees  to  enhance their long-range financial security through
regular  savings  with  the  benefit  of  Ralston  Purina  Company (the Company)
matching  contributions.

The  Plan  is  subject  to  certain provisions of the Employee Retirement Income
Security  Act of 1974, as amended (ERISA).  However, benefits under the Plan are
not  eligible  for  plan  termination  insurance provided by the Pension Benefit
Guaranty  Corporation  under Title IV of ERISA.  It is the Company's intent that
the  Plan  meet  the  requirements  of  Section 404(c) of ERISA.  Section 404(c)
relieves  plan  fiduciaries  of  liability  for  losses  that are the direct and
necessary  result  of  the  participant's exercise of control over assets in the
participant's  savings  plan  account.

PLAN  PARTICIPATION  -  Participation  in  the Plan is open to substantially all
regular  full and part-time domestic employees of the Company and its designated
subsidiaries,  including  certain  internationally  assigned  employees  who are
subject  to  U. S.  Federal  Insurance Contributions Act tax.  Participants may
contribute  to the Plan upon enrollment; however, one year of covered service is
required in order to receive Company matching contributions (see "Contributions"
below).

CONTRIBUTIONS  - Effective January 1, 1999, significant changes were made to the
Plan's  contribution  structure.  As  of  this date, participants can contribute
from  1%  to  14%  of their compensation in 1% increments on a before-tax basis,
subject  to Internal Revenue Service (IRS) limits.  Before-tax contributions not
exceeding  4%  of  the  participant's  compensation  will  be matched 25% by the
Company.  One  year  of  covered service is required in order to receive Company
matching  contributions.

A participants' after-tax contributions of 1% or 1.75% of compensation receive a
Company  match  of  300%  that  is credited to a participant's PensionPlus Match
Account  in  the  Ralston Purina Retirement Plan, the Company's non-contributory
defined benefit pension plan covering substantially all domestic employees.  One
year of covered service is required in order to receive the Company match in the
PensionPlus Match Account.  Participants may also contribute an additional 1% to
22%  of  their  compensation  on  an  after-tax basis that is not matched by the
Company,  subject  to  IRS  and  Plan  limits.

Combined  before-tax  and  after-tax  participant  contributions  may not exceed
23.75%  of  compensation,  as limited by federal income tax laws and Plan terms.
The  total of before-tax, after-tax and Company matching contributions allocated
to  participants'  accounts  is  limited  to the lesser of $30,000 or 25% of the
participants'  compensation  for  the  calendar  year.

Prior  to  January 1, 1999, participants could make basic contributions of 2% to
12%  of  their  compensation  in 1% increments on a before-tax basis, subject to
certain  limits  imposed  by  the IRS and Plan terms.  For employees first hired
before  July  1, 1993, basic contributions not exceeding 6% of the participant's
compensation were matched 100% by the Company after one year of covered service.
For  employees  first  hired on or after July 1, 1993, after one year of covered
service,  the  Company  matched  basic  contributions  of  2% to 6% by initially
contributing  20% of the maximum Company match, increasing in 20% increments for
each  additional  year of service up to a maximum of 100% of the maximum Company
match  after  five  years  of  service.

Participants  could also make supplemental after-tax, unmatched contributions of
1%  to 10% of their compensation in 1% increments, subject to certain IRS limits
and Plan terms.  Participant contributions, both before-tax and after-tax, could
not  exceed  15%  of  their  compensation.  The  Company  imposed,  on  highly
compensated employees, a before-tax contribution limit of 10% and a supplemental
after-tax  contribution  limit  of  4%.

INVESTMENT  OPTIONS  -  All  participant  contributions  are  invested  at  the
participant's direction in the investment funds offered by the Plan and selected
by  the  participant.  Effective April 22, 1999, the RAL Stock Fund and the ESOP
Common  Stock  Fund  were  combined  into a single fund, the Ralston ESOP Common
Stock  Fund.  The  25% Company match on the participant's first 4% of before-tax
contributions  is  directed  to  this fund.  A participant's investments in this
merged  fund  are  fully  diversifiable  into  other  funds  within  the  Plan.
Participants  may  also  transfer  amounts  from other investment funds into the
Ralston  ESOP  Common  Stock  Fund.

The  leveraged  employee  stock  ownership  plan  (ESOP), a 10-year program, was
available  for  participation beginning February 1, 1989, following the creation
of  the  ESOP  Preferred Stock Fund (ESOP Fund).  Beginning February 1, 1989 and
ending  December  31,  1998,  a  participant's basic contribution of up to 6% of
compensation  and the Company matching contribution thereon were invested in the
ESOP  Fund.  The  ESOP  Fund  invested  exclusively  in  Series  A  6.75%  ESOP
Convertible  Preferred  Stock  of the Company (Preferred Stock).  See Note 3 for
further  discussion  of  the  ESOP  Fund.

Through  Plan  year  1998,  basic contributions in excess of 6% and supplemental
after-tax  contributions  were  invested  by  the  Trustee  at the participant's
direction,  in  the  investment  funds  offered  by the Plan and selected by the
participant.  Participants  could allocate the investment of these contributions
to  any  of the investment funds maintained pursuant to the Plan except the ESOP
Fund and the Agribrands Common Stock Fund.  See Notes 3 and 6, respectively, for
further discussion of the ESOP Common Stock Fund and the Agribrands Common Stock
Fund.

VESTING  -  Employee before-tax and after-tax contributions and earnings thereon
vest immediately, while Company matching contributions and earnings thereon vest
over  a  period of four years at a rate of 25% per year for each year of Company
service.  Participants  are  100%  vested  in Company matching contributions and
earnings  thereon  after  4  years  of service.  In the event of a participant's
retirement,  death, or total and permanent disability, Company contributions and
earnings  thereon become 100% vested, even if the participant has rendered fewer
than  4  years  of  service.

PLAN  WITHDRAWALS  -  Plan  withdrawals  of before-tax contributions may be made
prior to termination or retirement for cases of financial hardship or at the age
of  59  1/2.  Hardship  distributions are limited to the amount required to meet
the  need  created  by  the  hardship and are made at the discretion of the Plan
administrator  (see  "Plan  Administration" below).  After-tax contributions and
earnings  thereon  may  be  withdrawn  at  any  time.

PARTICIPANT  LOANS  - Participants may borrow from their accounts subject to the
provisions  of  the  Plan.  Loans  are limited in the aggregate to the lesser of
$50,000  or  50%  of  the vested amount in the participant's account, reduced by
other  outstanding  participant  loan  balances  on  the  date of the loan.  The
minimum  loan  amount  is $1,000.  Participants pay interest on such loans, at a
fixed  rate  of 1 percentage point above the prime rate on the date of the loan.
Participant  loans  can  be short or long-term, up to a maximum loan period of 5
years  for  general  purpose  loans and 10 years for the purchase of a principal
residence.  Loan  repayments are made through payroll deduction each pay period.
A  promissory  note  in the amount of the loan must be delivered to the Trustee,
and,  in  the  event  of  the  participant's termination, the unpaid balance and
accrued  interest  become  due  immediately  and  payable  in  full.

FORFEITURES  -  Upon  the  participant's  termination of employment, any Company
matching  contributions  and  the  earnings thereon which are not vested will be
forfeited,  but  will  be  restored  and  eligible for additional vesting if the
participant  again  becomes  an  eligible  employee  within  five  years  after
termination  and  completes  additional  years  of service.  Forfeitures, net of
amounts restored, are used to reduce future Company contributions required under
the  Plan.  Forfeitures  were $128,000 and $190,000 for the years ended December
31,  1999  and  1998,  respectively.

PLAN  ADMINISTRATION  -  The Plan is administered by the Company.  Management of
Plan  assets  is  under  the  direction  of the Company's Employee Benefit Asset
Investment  Committee  (EBAIC).  Members  of the EBAIC are Company employees and
are  appointed  by  the  Company's  Chief Executive Officer.  Vanguard Fiduciary
Trust  Company  is Trustee of the funds and assets of the Plan; however, Bankers
Trust  Company  served  as  Trustee of the ESOP Fund until February 4, 1999 (see
Note  6  for  further discussion).  As Trustee, Vanguard Fiduciary Trust Company
has  the  authority  to  hold,  manage  and  protect  the  assets of the Plan in
accordance  with  the  provisions  of  the  Plan  and  the  trust  agreements.

PLAN  TERMINATION  -  The  Company  may,  by  action  of its Board of Directors,
terminate the Plan with respect to all participating companies.  In case of such
termination,  participants  shall  be  fully  vested  in  Company  matching
contributions  credited  to  their  accounts and, subject to Plan provisions and
applicable  law,  the  total  amount  in  each  participant's  account  shall be
distributed  to  the  participant  or  for  the  participant's  benefit.


NOTE  2  -  SUMMARY  OF  SIGNIFICANT  ACCOUNTING  POLICIES
----------------------------------------------------------

The  significant  accounting  policies followed by the Plan are described below:

BASIS  OF  ACCOUNTING  - The financial statements of the Plan are prepared using
the  accrual  basis  of  accounting  such  that  income  and related assets, and
expenses  and  related liabilities are recognized in the Plan year to which they
relate.

INVESTMENT  VALUATION  - The Plan's investments are stated at fair value, except
for  insurance company contracts, which are stated at contract value.  Shares of
registered  investment  companies  are  valued  at  quoted  market prices, which
represent  the  net asset value of shares held by the Plan at year end.  Company
common  stock  (RAL  Stock)  and Agribrands International, Inc. common stock are
recorded  at  fair  value, based on the closing market price of the stock on the
last  business  day  of  the  Plan year.  Notes receivable from participants are
valued  at  cost,  which  approximates  fair  value.

Investments  with  insurance  companies  are  all  benefit-responsive investment
contracts  reported  at contract value, which approximates fair value.  Contract
value represents contributions made under the contract, plus earnings, less Plan
withdrawals  and  administrative  expenses.  There  are  no  valuation  reserves
against  contract value for the credit risk of the contract issuer or otherwise.
The  average  yield for the investment contracts was 6.4% and 6.5% for the years
ended  December 31, 1999 and 1998, respectively.  The weighted average crediting
rate  for these contracts was 6.5% at December 31, 1999 and 1998.  The crediting
rate  is  based  on an agreed upon rate with the issuer, but cannot be less than
zero.

Investment  securities  are  exposed  to  various  risks, such as interest rate,
market  and credit.  Due to the level of risk associated with certain investment
securities  and  the  level  of  uncertainty  related to changes in the value of
investment  securities, it is at least reasonably possible that changes in risks
in  the  near term could materially affect the amounts reported in the Statement
of  Net  Assets  Available  for  Plan  Benefits.

Investments  that  represent  5  percent  or  more  of  the  Plan net assets are
separately  identified  in  the  "Statement  of  Net  Assets  Available for Plan
Benefits".

INCOME  RECOGNITION  -  Interest  income  is recognized when earned and dividend
income  is  recognized  on  the  date  of record.  Realized gains and losses are
determined  using  the  average  cost  method.

BENEFIT  PAYMENTS  -  Benefits  are  recorded  when  paid.

USE  OF  ESTIMATES  -  The  preparation  of  these financial statements requires
management to make estimates and assumptions that affect the reported amounts of
assets  and  liabilities, and revenues and expenses during the reporting period.
Actual  results  could  differ  from  those  estimates.


NOTE  3  -  EMPLOYEE  STOCK  OWNERSHIP  PLAN  (ESOP)  PROVISION
---------------------------------------------------------------

The  Company  authorized  shares  of  Preferred  Stock to be held by the Ralston
Purina Collective Trust for Savings Investment Plan (ESOT).  The Preferred Stock
assets of the Plan were held in the ESOT until the Preferred Stock was converted
to  RAL  Stock  on  December 31, 1998, in accordance with terms of the Preferred
Stock  and  terms  of the Plan.  Just prior to the close of business on December
31,  1998,  2,207,135 remaining issued and outstanding shares of Preferred Stock
in  the  ESOP Fund were converted into RAL Stock at a rate of 7.12 shares of RAL
Stock  for  one  share  of  Preferred Stock.  The ESOP Fund was renamed the ESOP
Common  Stock  Fund  and  participant  accounts  were credited with RAL Stock in
accordance  with  the  conversion  of the Preferred Stock.  Beginning January 1,
1999,  participants  could transfer out of the ESOP Common Stock Fund into other
funds  within  the  Plan at their discretion, subject to certain diversification
restrictions  on Company matching contributions and earnings thereon.  Effective
April  22,  1999,  the ESOP Common Stock Fund merged with the RAL Stock Fund and
the  diversification  restrictions  were  removed.  (See  Note  1  for  further
discussion.)

Prior  to  December 31, 1998, the Preferred Stock was convertible into RAL Stock
and  had  a  guaranteed  minimum value of $110.83 per share.  In accordance with
provisions  of  the Certificate of Designation of the Preferred Stock, one share
of  Preferred  Stock  was  convertible  into  7.12  shares  of  RAL  Stock.

Financing for the purchase of the Preferred Stock was provided from the proceeds
of a $500 million 8.25% fixed rate, 10-year private placement issue (ESOP Notes)
by  the ESOT, which matured on December 31, 1998.  Semi-annual payments of $27.5
million  were  made  during  the  Plan  year ended December 31, 1998. Payment of
principal  and  interest on the ESOP Notes was unconditionally guaranteed by the
Company.

Shares  of  Preferred  Stock were allocated to individual participants' accounts
based  on  the  total amount of basic matched and Company matching contributions
divided  by the guaranteed minimum value of the Preferred Stock.  Dividends paid
by  the  Company  on  the  Preferred  Stock  that were credited to participants'
accounts  may  have  been  used by the Plan to repay the ESOP Notes, and, if so,
additional  shares  equal  in value to the dividends credited, were allocated to
the  individual  participants'  accounts.  If  the dividends were not applied to
loan  payments,  the  dividends  were  paid  directly  in cash to the individual
participants.


NOTE  4  -  RELATED  PARTY  AND  PARTY-IN-INTEREST
--------------------------------------------------

The  Company, as Plan administrator and sponsor, is a related party to the Plan.
At  December  31, 1999 and 1998, the Plan held shares of RAL Stock with a market
value  of  $483,603,000  and  $636,085,000,  respectively.

For Plan years ended December 31, 1999 and 1998, the Plan purchased $212,057,000
and  $37,027,000,  respectively,  and  sold  $408,838,000  and  $85,219,000,
respectively,  of  RAL  Stock.  On  December  31,  1998,  the  Plan  converted
$508,767,000  of  Preferred Stock to RAL Stock, and then deposited the RAL Stock
into  the ESOP Common Stock Fund (see Note 3 for further discussion).  Exclusive
of  the  foregoing  transaction,  for the Plan year ended December 31, 1998, the
Plan converted $68,959,000 of Preferred Stock to RAL Stock; and sold $63,961,000
of  the  converted  RAL  Stock  to  the  Company.

Vanguard  Fiduciary  Trust Company and Bankers Trust Company, as Trustees of the
Plan's  assets,  are  parties-in-interest  as defined by ERISA.  For Plan assets
managed  by  Vanguard, the Plan held $257,493,000 and $222,844,000 of investment
funds  and  short-term  investments at December 31, 1999 and 1998, respectively.
Of  these investments, the Plan purchased $177,022,000 and $129,327,000 and sold
$112,620,000  and  $54,988,000  for  the  Plan years ended December 31, 1999 and
1998,  respectively.  For  Plan  assets managed by Bankers Trust Company through
February  4,  1999,  which  had  a  zero  balance at December 31, 1998, the Plan
purchased  and  sold  $104,235,000  for  the  Plan year ended December 31, 1998.
These  transactions  are  exempt  party-in-interest  transactions.


NOTE  5  -  INCOME  TAX  STATUS
-------------------------------

The  Plan  has received a determination letter from the IRS dated March 11, 1996
that the Plan constitutes a qualified plan and that the trust holding the Plan's
assets  is  exempt  from  income tax under the Internal Revenue Code of 1986, as
amended.  Participants' before-tax contributions, Company matching contributions
and  earnings  of  Plan  investments are not subject to federal income tax until
distributed  from  the  Plan.  Contributions made from a participant's after-tax
compensation  are  therefore not taxed when distributed from the Plan.  Earnings
related  to  these after-tax contributions are not subject to federal income tax
as  long  as  they  remain  in  the  Plan; however, such earnings are taxed when
distributed  from  the  Plan.


NOTE  6  -  OTHER  MATTERS
--------------------------

On  November  1,  1999,  the  Company  completed the sale of its Energizer Power
Systems Original Equipment Manufacturers' (OEM) rechargeable battery business to
Moltech  Corporation  (Moltech).  On  November 9, 1999, the Plan transferred the
net  assets  available  for  participants of $51,378,000 associated with Moltech
employees  to the Moltech Power Systems, Inc. Savings Investment Plan, and these
employees  are  no  longer  participants  in  the  Ralston  Plan.

Commencing  with  the  dividend payable on June 7, 1999, dividends earned on the
Ralston  ESOP  Common  Stock  Fund are passed through to Plan participants until
further  notice  and  may not be reinvested in the Plan.  For federal income tax
purposes,  the dividend pass through is considered deductible by the Company and
taxable  to  participants.

With  the  conversion  of  the  Preferred Stock to RAL Stock, Vanguard Fiduciary
Trust Company became trustee of these converted shares.  Bankers Trust Company's
role  as  trustee was terminated on February 4, 1999 after exercising the voting
rights  associated  with  the  Preferred  Stock.

On  April  1,  1998,  the  Company  effected  a  spin-off to shareholders of its
Agricultural  Products  business  (Agri).  The  new  company  is  Agribrands
International, Inc.  Just prior to the close of business on March 31, 1998, Agri
participants'  shares  of  Preferred  Stock  in  the  ESOP Fund were mandatorily
converted  into  RAL Stock, in accordance with the terms of the Preferred Stock,
and  placed into the RAL Stock Fund.  Subsequently, Agri employees' Plan assets,
including shares of Company stock in the RAL Stock Fund, were transferred to the
Agribrands  International,  Inc.  qualified  401(k) plan, in accordance with IRS
regulations.  As  of  the date these assets were transferred, Agri employees are
no  longer  participants  of  the  Plan.

In  conjunction  with  the  spin-off,  the  conversion ratio for Preferred Stock
changed  from  2.29 shares of RAL Stock for one share of Preferred Stock to 2.37
shares.  Additionally,  as  of April 1, 1998, all participants of the Plan's RAL
Stock  Fund  became  entitled  to  receive,  and  later  received,  one share of
Agribrands  International,  Inc.  common  stock for every 10 shares of RAL Stock
held.  Participants  were  required  to  sell  the  remaining  Agribrands
International,  Inc.  common  stock received and still held in the Plan by March
31,  1999,  and  could  transfer the proceeds to any other fund within the Plan,
except  to  the  ESOP  Fund  through  December  31,  1998.

On  May  28,  1998,  the  Company  declared  a  three-for-one  stock  split  to
shareholders  of  record  at  the  close of business on June 22, 1998.  Employee
shareholders  who  were  participants in the RAL Stock Fund of the Plan received
two  additional shares of RAL Stock for each share then owned.  These additional
shares  were  credited  to  the  participants'  accounts  on  July 15, 1998.  In
conjunction  with  this  stock  split,  the conversion ratio for Preferred Stock
changed  from  2.37 shares of RAL Stock for one share of Preferred Stock to 7.12
shares.





NOTE  7  -  SUBSEQUENT  EVENT
-----------------------------

On  April  1,  2000,  the  Company  effected  a spin-off of its Battery Products
Business  (Energizer).  In  conjunction with the spin-off, Energizer created the
Energizer  Savings  Investment  Plan.  The  net  assets  available  to  plan
participants  associated  with  Energizer  employees  were  transferred  to  the
Energizer  Savings  Investment  Plan,  and  these  individuals  are  no  longer
participants  in  the  Ralston  Plan.

<PAGE>





<TABLE>

<CAPTION>


                                             ATTACHMENT  I
                            RALSTON  PURINA  COMPANY  SAVINGS  INVESTMENT  PLAN
                                    EIN  43-0470580   PLAN  NO.  140
                           SCHEDULE  OF  ASSETS  HELD  FOR  INVESTMENT  PURPOSES
                                          DECEMBER  31,  1999
                                        (DOLLARS  IN  THOUSANDS)



<S>    <C>                     <C>                                           <C>         <C>
      (b) Identity of Issue,
          Borrower, Lessor,   (c) Description of Investment Including
          or Similar              Maturity Date, Rate of
          Party                   Interest, Collateral,                                  (e) Current
(a)                                Par, or Maturity Value                    (d) Cost          value
---    ---------------------      -------------------------------------        --------     ---------

*      Vanguard Group             Money Market Reserve Fund -
                                   Prime Portfolio                           $  2,188     $    2,188
*      Vanguard Group             Short-Term Corporate Bond Fund               13,871         13,796
*      Vanguard Group             Index Trust - 500 Portfolio                  70,110        115,837
*      Vanguard Group             Money Market Reserve Fund -
                                   Federal Portfolio                           20,383         20,383
*      Vanguard Group             Wellington Fund                              29,203         28,918
*      Vanguard Group             Windsor II Fund                              36,231         33,363
*      Vanguard Group             International Growth Portfolio               14,858         19,308
*      Vanguard Group             Investment Contract Trust Fund (Retire.
                                   Savings Trust)                                 -              -
*      Vanguard Group             Small Cap Index Fund                         11,714         13,428
*      Vanguard Group             LifeStrategy Conservative Growth Fund         1,591          1,615
*      Vanguard Group             LifeStrategy Growth Fund                      4,198          4,553
*      Vanguard Group             LifeStrategy Income Fund                      1,129          1,114
*      Vanguard Group             LifeStrategy Moderate Growth Fund             2,856          2,990
                                                                              -------       --------
                                    Total Investment in Shares in
                                     Registered Investment Company            208,332        257,493

      Agribrands                  Common Stock                                     -              -
*     Ralston Purina Company      Common Stock                                285,844        483,603
                                                                             --------       --------
                                    Total Investment in Common Stock          285,844        483,603

      Deutsche Bank               Insurance Contract Separate Account           3,612          3,612
      Natwest                     Insurance Contract Separate Account           4,813          4,813
      New York Life               Insurance Contract Separate Account           3,162          3,162
      Peoples Security Life       Insurance Contract Separate Account           3,184          3,184
      Union Bank Switzerland      Insurance Contract Separate Account          10,028         10,028
      West Landesbank             Insurance Contract Separate Account           9,269          9,269
      Rabobank Insurance          Insurance Contract Separate Account           3,006          3,006
      Rabobank Nederland          Insurance Contract Separate Account           6,770          6,770
                                                                             --------       --------
                                    Total Insurance Company Contracts          43,844         43,844

Participants                      Notes Receivable from Participants
                                   (6% to 13% interest)                        24,389         24,389
                                                                             --------       --------
                                                                             $562,409       $809,329
                                                                             ========       ========
</TABLE>


*  Investment  represents  allowable  transaction  with  a  party-in-interest.

<PAGE>


<TABLE>

<CAPTION>


                                                      ATTACHMENT  II
                                          SCHEDULE  OF  REPORTABLE  TRANSACTIONS  *
                             RALSTON  PURINA  COMPANY  SAVINGS  INVESTMENT  PLAN (EIN 43-0470580)
                                               YEAR  ENDED  DECEMBER  31,  1999


<S>                   <C>                           <C>             <C>            <C>
                     (b) Description of Asset
(a) Identity of      (Include interest rate        (c) Purchase    (d) Selling   (e) Lease
Party Involved       and maturity in the case of   Price           Price          Rental
                     a loan)
----------------    ----------------------------   ------------     -----------   -----------
Vanguard Group       Vanguard Index Trust -
                       500 Portfolio               $   50,882,766 $         -    $        -
Vanguard Group         RAL Stock                   $  212,057,394
Vanguard Group         RAL Stock                                    408,838,474



<S>                    <C>                      <C>                        <C>
(f) Expense            (g) Cost                 (h) Current Value
Incurred with          Of Asset                 Of Asset On              (i) Net
Transaction                                     Transaction Date         Gain(Loss)
---------------        --------------           ------------------       ------------
$             -        $  50,882,766              $    50,882,766        $          -
                       $ 212,057,394              $   212,057,394
                         232,326,438                  408,838,474          176,512,036

</TABLE>

*  Transactions or a series of transactions in excess of 5% of the current value
of  the  Plan's  assets  as  of  the  beginning  of  the plan year as defined in
section  2520.103-6  of  the  Department  of Labor Rules and Regulations for
Reporting  and  Disclosure  under  ERISA.


<PAGE>
Pursuant  to  the  requirements  of the Securities Exchange Act of 1934, Ralston
Purina  Company  as  Plan Administrator of the Savings Investment Plan, has duly
caused  this  annual  report  to  be  signed  by  the undersigned thereunto duly
authorized.

                                        RALSTON  PURINA  COMPANY



                                        By:    /s/ C.S. Sommer
                                               ----------------------------
                                               C. S. Sommer, Vice President
                                               and Director, Administration
                                               Ralston Purina Company

June 28, 2000


i:\sec\11k\06200011k.doc
<PAGE>

                                  EXHIBIT INDEX


Exhibits
----------

23     Consent  of  Independent  Accountants
     (provided  electronically)










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