November 17, 2010
BY EDGAR
Securities and Exchange Commission
450 Fifth Street, N.W., Mail Stop 0309
Washington, D.C. 20549
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Attn:
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Jim B. Rosenberg, Senior Assistant Chief Accountant
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Sasha S. Parikh, Staff Accountant
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Mark Brunhofer, Review Accountant
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Re:
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Charles River Laboratories International, Inc.
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Form 10-K for the Fiscal Year Ended December 26, 2009
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Form 10-Q for the Fiscal Quarter Ended June 26, 2010
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File No. 1-15943
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Ladies and Gentlemen:
Charles River Laboratories International, Inc. is in receipt of your letter dated November 5, 2010 and appreciates the opportunity to respond to your comments. We are writing to inform you that we intend to provide a response to your comments no later than December 3, 2010.
If you should have any questions about this letter, please call the undersigned at (781) 222-6103.
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Very truly yours,
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/s/ Thomas F. Ackerman
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Thomas F. Ackerman
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Corporate Executive Vice President and
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Chief Financial Officer
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251 Ballardvale Street, Wilmington, MA 01887 • 978.658.6000 • FAX: 978.658.7132 • www.criver.com