I was very skeptical when you wonderful people posted that my new Orange HM was probably a tail biter. Well I finally caught him - wasn't even thinking about it because I have NEVER seen him even attempt to bite his tail. I was saying the usual babble to him and he was wriggling like a little happy boy when suddenly he twisted like a little pretzel, grabbed hold of his new healed finnage and chowed down! I was horrified, yet strangely happy to know it wasn't my fault. At least I know I can try and divert his attention, keep him busy, etc. It's a funny thing to see. 

