Tough one. I don't leave food out for my cats at all. I feed twice a day at 7am and 8pm. Speckles is on a low-protein diet and Max can each anything, but because of Specks change in diet and their ages (16 and 10) I decided to put them both on the same low-protein diet otherwise Speckles (the little piggie) would not eat her good food and wander over to Max's dish and get the good stuff. Why not try feeding the kitten in a separate room away from the adults.