Over the years here we have taken a number of birds with no spurs or just one. One of the birds we took in Texas last year also only had one spur. About 3 or 4 years ago a friend took a bird that had one normal spur but the other leg had something(I hesitate to call it a spur) on it, right where the spur would normally be. This thing,was over two an a half inches long! It really didn't even look like a spur,kind of scally and rounded on the end. The other spur was normal and about three/quarters of an inch. I don't know if it had been injured at some time and this is what grew back or what,but man it sure looked wierd.