Donna's right. Feed them once and put up the food - same time each day. If your cat wakes you up in the middle of the night, put it outside or in your garage, and get a good night's sleep. Who's in charge here?
Are there any natural (non-offensive to humans) cat repellants that can be used indoors? Spices, household cleaners, etc? I have one room that is off-limits to the cat, but impossible to keep the door closed at all times.
