I am looking into testing my 3 does and I have a few questions. 1: Is Johnes accurate? Should I even bother with having it done? One lab says that it is recommended that your goat is 18 months old, so I guess I can’t do Racheal. 2: What labs are the best and reasonably priced? 3: Is it risky drawing blood yourself? Any advice would be greatly appreciated. Thanks!