EXHIBIT 24

POWER OF ATTORNEY
SECTION 16 FILINGS

Know all by these presents, that the undersigned hereby constitutes
and appoints David P. Johst and Matthew L. Daniel as the undersigned's
true and lawful attorneys-in-fact to:

(1) prepare, execute in the undersigneds name and on the
undersigneds behalf, and submit to the U.S. Securities and Exchange
Commission (the SEC) a Form ID, including amendments thereto, and any
other documents necessary or appropriate to obtain codes and passwords
enabling the undersigned to make electronic filings with the SEC of
reports required by Section 16(a) of the Securities Exchange Act of
1934 or any rule or regulation of the SEC;

(2) execute for and on behalf of the undersigned, in the undersigned's
capacity as an officer and/or director of Charles River Laboratories
International, Inc. (the Company), Forms 3, 4, and 5 in accordance with
Section 16(a) of the Securities Exchange Act of 1934 and the rules
thereunder, and any other forms or reports the undersigned may be
required to file in connection with the undersigneds ownership,
acquisition, or disposition of securities of the Company;

(3) 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, complete and execute any amendment or amendments thereto, and
timely file such form with the United States Securities and Exchange
Commission and any stock exchange or similar authority; and

(4) 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, 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 the 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,or such attorney-
in-fact's substitute or substitutes, 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.

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 attorneys-in-fact.

IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to be
executed as of this 13th day of February, 2009.


/s/Christophe Berthoux
Signature