HI. I called my original vet, the holistic one, and tried to find out what the results on that blood test were, and also to see why they didn't mention thyroid problems as a possible cause. The vet was out until Monday, but the lady told me his T4 level then, (Oct., 2010- when the diabetes symptoms started), was at 1.4. Then I called the other vet about the more recent test from a few months ago, and it was 1.4 as well. I wouldn't want to try herbs for HT when it isn't it. If anything, the 1.4 is closer to hypo than hyperT. But the symptoms are closer to hyperT. Except for his energy levels. Here is some interesting stuff I found on hyperT, anyway:
Herbal remedies
Herbs that have been shown to be beneficial in treating hyperthyroidism in cats include native ones such as stinging and dwarf nettle, bugleweed and kelp as well as foreign ones like the Chinese herbs huang qi or Siberian ginseng. They are most often administered as tinctures, capsules or added to food.
Diet
Changes in your cat’s diet will aid the treatment of hyperthyroidism. Increase the amount of healthy food, or even better, base the entire diet exclusively on healthy foods. Feed a lot of raw beef and poultry. Avoid salmon, seafood and white fish. Soy is suspected of contributing to the development of hyperthyroidism. It contains high levels of isoflavones, the main substance suspected of causing hyperthyroidism. As it is present in many canned cat foods, it should also be avoided.
Mineral deficiencies, iodine in particular, are common in cats with hyperthyroidism. Hence, you need to make sure that your cat’s food contains plenty of iodine and proper amounts of selenium which makes thyroid hormones less toxic. To tackle abnormal thyroid cell growth also add docosahexaenoic and arachidonic acids to the food.
These home remedies for cats with hyperthyroidism will help you to keep the condition under control.
I just found out some of the herbs, like kelp, that are good for overactive thyroid can be used for hypoT, as well. If he is bordering on hypoT, I think I'll try it. And switch back to natural diet.