It is important to feed your cats treats to ensure a healthy diet. Cats are carnivores(meat-eaters) and can be fed some human foods are treats. Tuna, mackerel, and cooked poultry are good sources of protein to treat your cat to. These foods help develop the brain and eyesight of your cat. Bananas, cheese, eggs, catnips, and biscuit treats are healthy treats to feed your cat.