Hi Paula, I am confused. When you say "regulated" are you meaning the diabetes is regulated or is the Hyperthyroid regulated?
That link Ella provided is an excellent resource! My Tiger was diagnosed with Hyperthyroid and FD in February of this year. My vet suggested treating for hyperthyroid first; except I was unable to get Tiger to accept Tapazole. So we had the radio-iodine treatment done in March. Unfortunately, at our 3 month check up in July I discovered Tiger's thyroid was non-functioning, and so she now gets Levothyroxine in a chicken flavored compound. I had bloodwork done a few weeks ago, her Tscore was almost back to normal, which was encouraging. Her follow up visit will be this Friday.