I'm so sorry you and your cat are going through this. DH and I have had two senior cats with thyroid issues. One was treated with medication only; the other had a thyroidectomy. I don't remember the doses of the medication now, but both my cats lived long, happy lives. There is hope and as
neely
said, you are fortunate to live in the Atlanta area, with such a wide variety of vets to choose from. It can't hurt to call around and see which one might be the best for your cat. I just wanted to give you some extra encouragement. Your cat is blessed to have someone who cares so much.