You get three legged dogs that can catch bunnys.
It's probably not going to turn quite as well as a dog with a full tail maybe, but who cares, the poor thing deserves to have it's fun, and if the best it can manage is a bit of ferreting, and spinning over the odd bits and bobs on the lamp, and out mooching, then that's fecking fantastic, seeing where it came from.
Well done to you for giving her a go mate, she may just surprise you, she certainly has some inner fire, to have come through what she did. She might just surprise you.