Pendergrass Library has 1400 books in SF 400-800 on all aspects of pet health, including behavior, nutrition, wellness, caring for senior animals. Here is a sample:
Eco dog : healthy living for your pet / Corbett Marshall and Jim Deskevich SF427 .M35 2008
Frogs, toads, and treefrogs : everything about selection, care, nutrition, breeding, and behavior / R.D. Bartlett and Patricia Bartlett SF459.F83 B37 2007
My fat cat : ten simple steps to help your pet lose weight for a long and happy life/Martha Garvey/SF985 .G33 2005
Kindred spirit, kindred care : making health decisions on behalf of our animal companions / Shannon Fujimoto Nakaya/ SF413 .N35 2005
Parenting your dog : develop dog-rearing skills for a well-trained companion / Trish King/SF431 .K558 2010
Feed your pet right : the authoritative guide to feeding your dog and cat / Marion Nestle and Malden C. Nesheim/SF427.4 .N47 2010