Jeri,
If you go to kvvetsupply.com and punch in brake-fast dog food bowl - item number: 82759 you will see what I mean...I think this can be the end to your problems of her over eating and being able to leave the food out. I am attaching the link but you might have to use the item name/number to find it because sometimes their link acts up when you send it:
KV Vet Supply / KV HealthLinks - Pet, equine & livestock supplies / Quality nutrition for you!