Choosing the Right Diet for Your Dog or Cat Walk down the pet food aisle and you'll find words like "ancestral," "wild-caught," "grain-free," and "human-grade" staring back at you from every bag. Dozens of choices for protein types, from chicken and beef to alligator and kangaroo. Vegan, vegetarian, raw, fresh, preservative-free, freeze dried…It's a lot. [...]