All three of Kowalski's dogs, Rudy, Buddy and Rylie, are on a complete raw food diet. "Just like humans, [dogs] need certain vitamins and minerals to be as healthy as they can," Kowalski said.

(“ Dogs can get by just fine on a vegetarian diet,” Opinion, Dec. 27) My dogs have always been on a vegan diet, and they have all thrived, healthy and strong, well into old age.