EXHIBIT 24
                                POWER OF ATTORNEY


         Know all by these presents, that the undersigned hereby constitutes and
appoints each of Rodney Carter, Darragh J. Davis and Sabrina M. Randolph, or
anyone of them signing singly, the undersigned's true and lawful
attorney-in-fact to:

                  (1) execute for and on behalf of the undersigned, in the
         undersigned's capacity as an officer, director and/or more than 10%
         stockholder of PETCO Animal Supplies, Inc.(the "Company"), Forms 3, 4
         and 5 (including amendments thereto) with respect to securities of the
         Company) in accordance with section 16(a) of the Securities Exchange
         Act of 1934 and the rules thereunder;

                  (2) do and perform any and all acts for and on behalf of the
         undersigned which may be necessary or desirable to complete and execute
         any such Form 3, 4 or 5 (or amendments thereto), and timely file such
         form with the United States Securities and Exchange Commission and any
         stock exchange or similar authority; and

                  (3) take any other action of any type whatsoever in connection
         with the foregoing which, in the opinion of such attorney-in-fact, may
         be of benefit to, in the best interest of, or legally required by, the
         undersigned, in connection with filing such Form 3, 4 or 5, it being
         understood that the documents executed by such attorney-in-fact on
         behalf of the undersigned pursuant to this Power of Attorney shall be
         in such form and shall contain such terms and conditions as such
         attorney-in-fact may approve in such attorney-in-fact's discretion.

         The undersigned hereby grants to such attorney-in-fact full power and
authority to do and perform any and every act and thing whatsoever requisite,
necessary, or proper to be done in the exercise of any of the rights and powers
herein granted, as fully to all intents and purposes as the undersigned might or
could do if personally present, with full power of substitution or revocation,
hereby ratifying and confirming all that such attorney-in-fact shall lawfully do
or cause to be done by virtue of this power of attorney and the rights and
powers herein granted. The undersigned acknowledges that the foregoing
attorney-in-fact, in serving in such capacity at the request of the undersigned,
is not assuming, nor is the Company assuming, any of the undersigned's
responsibilities to comply with section 16 of the Securities Exchange Act of
1934, and that this Power of Attorney does not relieve the undersigned from
responsibility for compliance with the undersigned's obligations under the
Exchange Act. The undersigned further acknowledges that this Power of Attorney
authorizes, but does not require, the attorney-in-fact to act in his discretion
on information provided to him without independent verification of such
information.

         This Power of Attorney shall remain in full force and effect until the
undersigned is no longer required to file Forms 3, 4 and 5 with respect to the
undersigned's holdings of and transactions in securities issued by the Company,
unless earlier revoked by the undersigned in a signed writing delivered to the
foregoing attorney-in-fact.

         IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney
to be executed effective this 24th day of February 2006.

                                                     /s/ Julian C. Day
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                                                     Signature

                                                     Julian C. Day
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                                                     Print Name