One of our male cats when he wants to eat and is not getting his wishes, starts bullying our female cat. I don't know what to do because I try to keep them to scheduled meal times and he'll sometimes want to eat when it's not his mealtime. But if I walk out of the room without feeding him he'll start to bully the female cat. Is there any way to stop this? I never feed him in response to it, but not sure what else to do.