I have 7 year old who was diagnosed with diabetes a couple years ago. She gets 8 units of insulin twice a day and she had been on Science Diet W/d prescription food but was constantly pooping and eating it, had bad breath, lethargic and was severely underweight. We decided to switch her food to something more nutritious and grain free with less fiber to help her weight. She now gets 3 cans of merrick cowboy cookout and her breath got great, back to high energy and playful with normal urine and bowel movements. But she lost more weight! We tried giving her an extra can a day and it made her breath smell again, lethargic and severely flatulent. I am at a loss of what to do. Please help, we have been to 3 different vets and they know nothing of nutrition and don't know how to help her weight.