My one foster cat, Calloway, was diagnosed with diabetes, and he did not respond well to the insulin. His glucose levels were over 400 almost everytime we went in for an appt, it was horrible!! I had him with me for about 3 years, but 1/2 a year of that was him being diabetic (he's still around, but with another foster placement that can do injections more often when needed).

What I found that helped with the eating was buying Stage 1 in babyfood. Chicken, Turkey, Ham, Beef, Veal.... Calloway LOVED this, and would eat it rather than eating the wet food. He HATED the wet food. Stage 1 is just the meat and the broth, so it's good for them.

I hope you find something that will work for you that your kitty will like to eat. The food prescribed by the vet is just not tasty stuff.