Dog age : how young is your dog? give your dog a healthier, longer life 
Dahlgaard, Dondi S. 
 -  Penguin Group (USA) Inc.  2005 
 - 278 pages. 
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<br/><br/><label>ISBN: </label>0-525-94867-8 
<br/><br/><label>Dewey Class. No.: </label>FIC D138 2005