Hello Kelly. It’s great to hear from you. I am sorry about the itching. It sounds pretty severe. Your poor Turbo. I have had many cats have Depo Medrol (long acting steroid) injections over the years and none have ever become diabetic as a result. The vet says the percentage is very small, but you could research it. I understand your hesitation after Balti’s diagnosis with diabetes. You are on the right track with trying to eliminate chicken and beef. One cat that I had with severe pruritis who wasn’t getting any benefit from DepoMedrol injections is now on Atopica (cyclosporine.) It works quite well for him, but again, I believe it takes weeks to take effect. Some people have had success with Zyrtec for their cats. I have not. In my experience, my cats just sleep more which perhaps is why they don’t itch as much.
If it were my cat, I would probably opt for a single Depo injection and feed Turbo only low carb wet food (maybe he is already eating the same as Balti anyway.) And I would continue with the food trials.