Reply #2: Yes.

[Holly_Hobby]

I agree that Kelp is one cause.

I have one dog with hypothyroidism, and buried another with hypothyroidism. They were both fed kibble containing kelp. The dog that is still living was put on a raw diet. Within several months, he had an intolerance to warmth and was panting. A blood draw indicated a lower dose of Soloxine thyroid hormone. He was put on once/day dosing instead of twice/day. The warmth intolerance stopped, as well as the panting.

Can I explain how a thyroid can start working somewhat properly again after changing the diet? No. But it happened. That's all the proof I needed to know that kelp should not be fed. Unfortunately, he was fed that kibble for 6 years, so some of the damage to the thyroid is permanent.

I think once humans intervene in what Nature provides for us and our animals, we're asking for trouble.