Cats can eat apples, and feeding them apples regularly is very beneficial. However, the amount should not be too large each time, because cats are small and don't eat much. Their main food should be cat food. Eating too much other food can cause them to not be able to eat their main food, leading to indigestion.

However, it's important to note that apple cores and seeds are harmful to cats because they contain cyanide, which can cause poisoning. Therefore, when feeding apples to cats, be sure to remove the cores and seeds.