Sometimes It's Best Not to Share

If your pets were ordering off of a fast-food menu, your dog would thrive on cheeseburgers, whereas your cat would order a double patty but skip the bun and cheese.

Cats require far more meat protein than dogs, whose food contains a lot of grain and other ingredients. That means dog food doesn't quite work for cats. Felines especially need taurine, an amino acid that prevents blindness and heart and lung problems; arachidonic acid, a fatty acid; and nutrients not necessarily included in commercial dog food, like preformed vitamin A, which can be found only in animal tissue. The nutritional bottom line: Stick with cat food for your kitty.