I set this feeder up to try before leaving town. I froze ice packs & set for 12 hour feeding. It started rotating 12 hours later, then reversed 2 slots, then reversed again, & kept going back & forth non-stop. I finally just turned it off. When I took it apart to remove battery the ice packs were already melted & warm. I'm glad I tested before leaving town because I would have come home to a dead cat.