UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549
                                   FORM 12b-25

                           NOTIFICATION OF LATE FILING
(Check One): [X]Form 10-K [ ]Form 20-F [ ]Form 11-K [ ]Form 10-KSB [ ]Form N-SAR

For Period Ended: December 31, 2002
[ ] Transition Report on Form 10-K
[ ] Transition Report on Form 20-F
[ ] Transition Report on Form 11-K
[ ] Transition Report on Form 10-Q
[ ] Transition Report on Form N-SAR
For the Transition Period Ended: ___________________

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  Read Instruction (on back page) Before Preparing Form. Please Print or Type.
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 Nothing in this form shall be construed to imply that the Commission has
verified any information contained herein.
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If the notification relates to a portion of the filing checked above, identify
the item(s) to which the notification relates:
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                                     PART I
                             REGISTRANT INFORMATION

Full Name of Registrant:  The CattleSale Company

Former Name if Applicable:  Dynacore Holdings Corporation

Address of Principal Executive Office:  9901 IH 10 West, Suite 800
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City, State and Zip Code:  San Antonio, Texas 78230-2292







                                     PART II
                             RULES 12b-25(b) and (c)

         If the subject report could not be filed without unreasonable effort or
expense and the registrant seeks relief pursuant to Rule 12b-25(b), the
following should be completed. (Check box if appropriate)

    [X]         (a)  The reasons described in reasonable detail in Part III of
                     this form could not be eliminated without unreasonable
                     effort or expense;

    [X]         (b)  The subject annual report, semi-annual report, transition
                     report on Form 10-K, Form 20-F,11-K or Form N-SAR, or
                     portion thereof, will be filed on or before the fifteenth
                     calendar day following the prescribed due date; or the
                     subject quarterly report of transition report on Form 10-Q,
                     or portion thereof will be filed on or before the fifth
                     calendar day following the prescribed due date; and

                (c)  The accountant's statement or other exhibit required by
                     Rule 12b-25(c) has been attached if applicable.

                                    PART III
                                    NARRATIVE

         State below in reasonable detail the reasons why Form 10-K, 11-K, 20-F,
10-Q, N-SAR, or the transition report portion thereof, could not be filed within
the prescribed time period. (Attach extra sheets if needed)

         Management is in the process of finalizing the Registrant's disclosures
 necessitated by an acquisition that was consummated on February 25, 2003. The
information could not be assembled and analyzed by March 31, 2003 without
unreasonable effort and expense to the Registrant. The Form 10-K will be filed
as soon as practicable and within the 15 day extension period.







                                     PART IV
                                OTHER INFORMATION

(1) Name and telephone number of person to contact in regard to this
notification

          Phillip P. Krumb                         (210)    558-2898
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               (Name)                           (Area Code) (Telephone Number)

(2) Have all other periodic reports required under Section 13 or 15(d) of the
Securities Exchange Act of 1934 or Section 30 of the Investment Company Act of
1940 during the preceding 12 months or for such shorter period that the
Registrant was required to file such report(s) been filed? If answer is no,
identify report(s).
[X] Yes [ ] No ________________________________________________________________

(3) Is it anticipated that any significant change in results of operations from
the corresponding period for the last fiscal year will be reflected by the
earnings statements to be included in the subject report or portion thereof?
[ ] Yes [X] No

         If so, attach an explanation of the anticipated change, both
narratively and quantitatively, and, if appropriate, state the reasons why a
reasonable estimate of the results cannot be made.

                             The CattleSale Company
                  (Name of Registrant as Specified in Charter)

Has caused this notification to be signed on its behalf by the undersigned
hereunto duly authorized.


Date March 31, 2003                 By  /s/ Phillip P. Krumb
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                                        Phillip P. Krumb
                                       Chief Financial Officer, Vice President