I know the idea of having a tail-less dog isn't nice, but I remember a case at my old clinic where we had a lab come in with a mass under her tail right near the base. I don't remember what it came back as, but the owners opted to have it removed, no amputation. Well the area would not close properly and the owners kept having to come back. In the end we ended up amputating the tail and the dog was fine.
Pookie, Papillon 4/17/09
Kaiser, GSD 4/14/11