Wow, indeed -- i'm doing a happy-dance (figuratively speaking) as i write....
Peter at Hyperlipid just did a blog-post on thyroid, and it fills in some holes in my understanding. THIS is where a clinician runs rings around all the researchers and theoreticians in the world! :-D When you REALLY want to find out what's going on in a body, you learn to get the info you need one way or another -- if you can't get it directly, you find a way around.
I can't begin to summarize all his points -- you'll have to go read his post! ...But i feel like it's a vindication of all i've been writing the last few days.
Of course, a knee-jerk reaction of mine within the first few paragraphs i read, was "how does a cat become hypothyroid? could it be ... malnutrition?"