Reply #11: Point #1: Purina cat food is utter crap.

[kestrel91316]

Point #2:I don't think the endocrine disruptors are in the food ingredients, and I don't blame preservatives. The packaging is suspected to be the problem behind hyperthyroidism in cats.

The pop-top aluminum cat food cans have a thin coating inside that contains, among other things, a known endocrine disruptor that has been proven to cause hyperthyroidism in lab rats. It apparently leaches into the canned food.

It's certainly curious that, of all the cats I've ever had, the ONLY one (so far) to develop hyperthyroidism has been my kitty-aunt Dusty, who I inherited when my grandparents passed away. For the first 8 years of her life she got canned food every day. None of my other cats have ever had more than the occasional can of food (they thrive on kibble) until their health starts to fail in old age. It's certainly an interesting coincidence.