So i posted a thread about Riley, my Sheltie that turned 2 yesterday, and all of the problems with aggression I have been having lately. I had a couple people post back about thyroid problems and started to look into it a little bit more. This makes a lot of sense because I know it is common among Shelties and he has a reoccurring rash that I have not been able to find a cause of. Is there any way that someone can tell me if this sounds accurate and how to test. Also some information on test costs and medication costs would be great as well!