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1. Interesting story of Hyperthyroidism in cats. I had 2 kitties with the disease. One had surgery and the other had Radiaoactive Iodine therapy.
   I have always thought it could be linked to chemicals.
   I also had 2 cats with Kidney Failure and know many folk with kidney cats.
   The two cats I have at the moment are indoor only, soon after I got them I read an article on the chemicals they are exposed to. That is one of the reasons I make most of my own cleaners now.

2. After some expensive blood tests, our 14-year old cat was diagnosed with marginal hyperthyroidism. We decided to go with the radioactive iodine solution but, after talking with the nuclear medicine specialist, she advised us to wait a few months because the condition was so marginal that the treatment could have resulted in HYPOthyroidism: a loss of thyroid function.

   We started thinking about causes and realized that we had recently started feeding her canned human tuna with most meals. This was the best quality tuna and she much enjoyed it which, as she had been a very fussy eater, was a relief to us. We researched this further and found that tuna was a significant source of heavy metals which could cause hyperthyroidism, so we stopped feeding it to her and turned to a meat-based diet, which she was not at all happy about, having become a tuna junkie. Over a couple of months, her hyperthyroidism completely disappeared.

   We are not suggesting that all cases of hyperthyroidism in cats is due to heavy metals in tuna, but it is worth considering. It worked for us.

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