Control quality. Don't feed your pet human junk food like pizza or sweets such as baked goods, ice cream or cookies. Home-prepared meals using fresh ingredients are acceptable, Davis says. Wholesome items such as brown rice, fresh lean meats and carrots are recommended. Be sure to avoid the human foods that can be toxic to cats and dogs: grapes/raisins, mushrooms, chocolate and coffee. Tomatoes and garlic can also be toxic for cats.