Before opting for insulin, I would change the diet including switching to grain free foods or raw and an excercise routine for Fluffy or Fido.
I am far from qualified to offer an opinion, BUT, I thought in humans at least, diabetes is unreversable. Type II is preventable, and if your on your way to developing it, a change in diet and exercise can prevent it, but once you develop it, all you can do with healthier habits is reduce the severity, you can't reverse it no matter what you do.
I imagine the same is true in other animals as well as humans.
Uniformed guess, am I wrong in any of that?
Prevention and control the key. I don't think you ever get rid of it once you have it.[/QUOTE
Diabetes in cats is reversible if caught early and treated aggressively- that is, their pancreas can start working again and producing insulin. The key is diet- cats are strict carnivores, which is why they should NEVER be fed grain-containing food, especially dry food. Most diabetic cats eat junk food, which causes the diabetes. Being obese doesn't help either.