Yes, they can, but there has to be a healthy disk, and enough of one leg to feed itself and be mobile. The problem here is that we're not talking about damage llike a cut, or being pinched, but rather ruptures of the vascular system. They typically do not survive. If the disk is damaged, removing the legs will not be helpful. Trying to remove them yourself could cause more trauma than it's already experiencing. I don't think cutting off the damaged legs will be helpful at this point, and could be detrimental.