I wrote about this in my book Deer Whisperer. A doe with triplet doe fawns and she bites the tail off one but never touches the other two. Never figured out why this happens but watched a different doe do the same to her single fawn . I yelled but the damage was done. Its like having a hair biting doe who keeps biting the hair off other deer, Only one solution (down the road dude). I don't think anyone has come up with the reason they do this tail biting. In April/2000
I wrote a article for Deer Farmer called Rabbits with antlers,fiction, whitetails with bunny tails , fact. You can find it in Deer Farmer library. Ever try to sell a deer with a short tail , it ain't going happen. You either have to keep them or give them away for free.