have you ever watched the show "it's me or the dog"? well the trainer say alfter the dog get done eating even if there is still some in the bowl to remove it alfter 15-20 min. hope this helps!! and say you want your dog to eat at 2:00 dont feed it at 1:00!!!!!! lol
As far as getting them to eat at a specific time, you have to feed them at that time every day. Only give food at that time, they figure it out. You can not leave food out all the time and expect them to eat when you want. They will eat when they are hungery.
As far as tipping the bowl over, you have to try non-tipable bowls. They have sprawled out sides, and are supposed to make the bowls harder to tip. I have used several in the past with puppies, and they work well. some bowls are also weighted. That can also help.