I've tried numerous matts and slow feeders. It didn't take her long to figure out that she can just flip or knock them over and inhale her food still. Currently I just try to break her meals up into 3 or 4 small ones and try to keep her from getting to wild for a bit after eating. She's a 3 year old APBT, so it's easier said than done. Constantly wants to be on the move and to play.