There is a theory that that has to do with endocrine disruptors, bisphenol A & suchlike. A related theory links the increase of hyperthyroidism in cats with the

There is a theory that that has to do with endocrine disruptors, bisphenol A & suchlike. A related theory links the increase of hyperthyroidism in cats with the increasing popularity of canned cat food, it's chemicals from the can liner interfering with the thyroid.