HANCOCK JOHN MUTUAL LIFE INSURANCE CO / MA
SC 13G/A, 1998-02-10
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                                  UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                  SCHEDULE 13G

                    Under the Securities Exchange Act of 1934
                               (Amendment No. 2)*


                             Suiza Foods Corporation
- --------------------------------------------------------------------------------
                                (Name of Issuer)
                                  Common Stock
- --------------------------------------------------------------------------------
                         (Title of Class of Securities)
                                    865077101
- --------------------------------------------------------------------------------
                                 (CUSIP Number)



Check here if a fee is being paid with this statement:  . (A fee is not required
only if the  filing  person:  (1) has a  previous  statement  on file  reporting
beneficial  ownership  of more than  five  percent  of the  class of  securities
described in Item 1; and (2) has filed no amendment subsequent thereto reporting
beneficial ownership of five percent or less of such class.) (See Rule 13d-7).

*The  remainder of this cover page shall be filled out for a reporting  person's
initial filing on this form with respect to the subject class of securities, and
for any  subsequent  amendment  containing  information  which  would  alter the
disclosures provided in a prior cover page.

The information required in the remainder of this cover page shall not be deemed
to be "filed" for the purpose of Section 18 of the  Securities  Exchange  Act of
1934 ("Act") or otherwise  subject to the liabilities of that section of the Act
but  shall be  subject  to all other  provisions  of the Act  (however,  see the
Notes).



                                                 PAGE 1 OF 4 PAGES

<PAGE>

<TABLE>
<CAPTION>

     <S>                                                                             <C>
- ---------------------------------------                                         --------------------------------------
CUSIP No.   865077101                                    13G                    Page  2  of  4  Pages
- ---------------------------------------                                         --------------------------------------

- --------- ------------------------------------------------------------------------------------------------------------
   1      NAME OF REPORTING PERSON
          S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

          John Hancock Mutual Life Insurance Company
          I.R.S. No. 04-1414660

- --------- ------------------------------------------------------------------------------------------------------------
   2      CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*                      (a)  |_|
                                                                                 (b)  |_|
          N/A

- --------- ------------------------------------------------------------------------------------------------------------
   3      SEC USE ONLY


- --------- ------------------------------------------------------------------------------------------------------------
   4      CITIZENSHIP OR PLACE OF ORGANIZATION

          Commonwealth of Massachusetts

- --------- ------------------------------------------------------------------------------------------------------------
                   -------- ------------------------------------------------------------------------------------------
                      5     SOLE VOTING POWER
    Number of
     Shares                 2,271,742:  1,723,267 directly and 548,475 through its indirect, wholly-owned
                            subsidiary, John Hancock Advisers, Inc.


                   -------- ------------------------------------------------------------------------------------------
  Beneficially        6     SHARED VOTING POWER
    Owned by
      Each                  -0-


                   -------- ------------------------------------------------------------------------------------------
    Reporting         7     SOLE DISPOSITIVE POWER
     Person
      With                  2,271,742:  1,723,267 directly and 548,475 through its indirect, wholly-owned
                            subsidiary, John Hancock Advisers, Inc.



                   -------- ------------------------------------------------------------------------------------------
                      8     SHARED DISPOSITIVE POWER

                            -0-

                   -------- ------------------------------------------------------------------------------------------
- --------- ------------------------------------------------------------------------------------------------------------
   9      AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

          2,271,742:  1,723,267  directly  and  548,475  through  its  indirect,
          wholly-owned subsidiary, John Hancock Advisers, Inc.



- --------- ------------------------------------------------------------------------------------------------------------
   10     CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*

          N/A

- --------- ------------------------------------------------------------------------------------------------------------
   11     PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9

          7.3%:  5.5% directly and 1.8% through its indirect, wholly-owned subsidiary, John Hancock Advisers, Inc.



- --------- ------------------------------------------------------------------------------------------------------------
   12     TYPE OF REPORTING PERSON*

          IC, IA

- --------- ------------------------------------------------------------------------------------------------------------
                                       *SEE INSTRUCTIONS BEFORE FILLING OUT!
                                                 PAGE 2 OF 4 PAGES
</TABLE>
<PAGE>

         The original  statement  shall be signed by each person on whose behalf
the  statement is filed or his  authorized  representative.  If the statement is
signed  on behalf of a person by his  authorized  representative  other  than an
executive  officer or general  partner of the  filing  person,  evidence  of the
representative's  authority to sign on behalf of such person shall be filed with
the  statement,  provided,  however,  that a power of attorney  for this purpose
which is already on file with the Commission may be  incorporated  by reference.
The name and any title of each person who signs the statement  shall be typed or
printed beneath his signature.

Note: Six copies of this statement, including all exhibits, should be filed with
the Commission.

     Attention:  Intentional  misstatements  or  omissions  of  fact  constitute
Federal criminal violations
(See 18 U.S.C. 1001)


         Item 1(a)    Name of Issuer:
                      Suiza Foods Corporation

         Item 1(b)    Address of Issuer's Principal Executive Offices:
                      3811 Turtle Creek Blvd.
                      Suite 1300
                      Dallas, TX   75219

         Item 2(a)    Name of Person Filing:
                      This filing is made on behalf of John Hancock  Mutual Life
                      Insurance Company ("JHMLICO").

         Item 2(b)    Address of the Principal Offices:
                      The  principal  business  office of  JHMLICO is located at
                      John Hancock Place, P.O. Box 111, Boston, MA 02117.

         Item 2(c)    Citizenship:
                      JHMLICO  is  organized  and  exists  under the laws of the
                      Commonwealth of Massachusetts.

         Item 2(d)    Title of Class of Securities:
                      Common Stock

         Item 2(e)    CUSIP Number:
                      865077101

         Item 3       If  the  Statement  is  being  filed  pursuant  to  Rule
                      13d-1(b), or 13d-2(b),  check whether the person filing is
                      a:

                      JHMLICO:      (c) (X) Insurance Company as defined in ss.3
                                            (a)(19) of the Act.

                                    (e) (X) Investment  Adviser  registered
                                            under   ss.203  of  the   Investment
                                            Advisers Act of 1940.

         Item 4       Ownership:

                      (a)    Amount  Beneficially  Owned:   JHMLICO  has  direct
                             beneficial  ownership of 1,723,267 shares of Common
                             Stock and indirect beneficial  ownership of 548,475
                             shares of Common  Stock  beneficially  owned by its
                             indirect,  wholly-owned  subsidiary,  John  Hancock
                             Advisers,   Inc.  ("JHA"),  an  investment  adviser
                             registered under ss. 203 of the Investment Advisers
                             Act of 1940.  The JHA  shares  are held in  various
                             registered investment companies.

                      (b)    Percent of Class: 7.3%
                             JHMLICO:          5.5%
                             JHA:              1.8%

                                PAGE 3 OF 4 PAGES


<PAGE>


                      (c) (i) sole power to vote or to direct the vote:
                              JHMLICO  has sole power to vote or to direct
                              the  vote  of  the   1,723,267   shares   as
                              discussed  in Item 4(a) above.  JHA has sole
                              power to vote or to  direct  the vote of the
                              548,475  shares  as  discussed  in Item 4(a)
                              above.

                          (ii)   shared power to vote or to direct the vote: -0-

                          (iii)  sole  power  to  dispose  or to  direct  the
                                   disposition:

                                    JHMLICO  has  sole  power to  dispose  or to
                                    direct  the  disposition  of  the  1,723,267
                                    shares as discussed in Item 4(a) above.  JHA
                                    has sole power to vote or to direct the vote
                                    of its 548,475 shares.

                          (iv)   shared power to dispose or to direct the 
                                 disposition of:     -0-

         Item 5       Ownership of Five Percent or Less of a Class:
                      Not applicable.

         Item 6       Ownership of More than Five Percent on Behalf of Another 
                       Person:   Not applicable.

         Item 7       Identification  and  Classification  of the  Subsidiary
                      which  Acquired  the  Security  Being  Reported  on by the
                      Parent Holding Company:
                      See Item 4(a) above.

         Item 8       Identification and Classification of Members of the Group:
                      Not applicable.

         Item 9       Notice of Dissolution of a Group:
                      Not applicable.

         Item 10      Certification:
                      By signing below the  undersigned  certifies  that, to the
                      best of its knowledge and belief, the securities  referred
                      to above were acquired in the ordinary  course of business
                      and were not  acquired  for the purpose of and do not have
                      the effect of changing or  influencing  the control of the
                      issuer  of  such  securities  and  were  not  acquired  in
                      connection  with or as a  participant  in any  transaction
                      having such purpose or effect.


                                                     SIGNATURE

         After  reasonable  inquiry and to the best of its knowledge and belief,
each of the  undersigned  certifies  that  the  information  set  forth  in this
statement is true, complete and correct.

                                    John Hancock Mutual Life Insurance Company
                                    By:      /s/Roger G. Nastou
                                             -----------------------------------
                                    Name:    Roger G. Nastou
Dated: February 9, 1998             Title:   Vice President





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