Hi redcat,This shoudn't harm your cat, but it might make Snooker gain weight. It's generally not recommended. I would recommend feeding Binky at set times of day in a separate room with a closed door to avoid this from happening. I'd also check out Snooker's food to make sure that it is good quality. He might be lacking something in his diet or bored with his food.Please inquire further if you have more questions. DerrickMuddy Paws