Both of the following databases have good information on this topic. For best results, try search terms like dogs and breeding or labrador breeding, etc.
Use whichever tool you like best to create your bibliography. Use MLA format.
If you aren't using NoodleTools and you just need a quick citation, EasyBib is the quickest & easiest way to obtain one. Students love it!
Available for ipads and Android tablets too! Just search for EasyBib
These books are on reserve at the circulation desk. Please ask and you can borrow it to read in the library or to make copies.
Encyclopedia of Dog Breeds by 
The Ultimate Encyclopedia of Dogs, Dog Breeds and Dog Care by 
The Encyclopedia of North American Sporting Dogs/Post by 
Encyclopedia of Cat Breeds by 
Encyclopedia of Cat Breeds by 
Encyclopedia of the Horse by 
The Encyclopedia of the Horse by 
International Encyclopedia of Horse Breeds by