I have heard good things about this book:
Dog Food Logic: Making Smart Decisions for Your Dog in an Age of Too Many Choices (check Amazon)
Author: “Linda Case is a canine nutritionist, dog trainer, and science writer. She earned her B.S. in Animal Science at Cornell University and her M.S. in Canine/Feline Nutrition at the University of Illinois. Following graduate school, Linda was a lecturer in canine and feline science in the Animal Sciences Department at the University of Illinois for 15 years and then taught companion animal behavior and training at the College of Veterinary Medicine”.
I find this site very helpful too: http://skeptvet.com/Blog/category/nutrition/
Science-based veterinary medicine.
