@Randy:
We're in Cedar Falls with our 2, Franklin and Eleanor. I introduced ourselves in 2009, and then promptly forgot about it. I need to get better about being on this forum, obviously!
Franklin was just diagnosed with low thyroid; we think he's about 7 yrs old.
Have you had a basenji before?
Low thyroid is pretty common in Basenjis (and many other breeds). Easy to control with Soloxine