Leg could be unusable, either drug or held up or may never know difference. It sounds swollen, should go down with in a day or two (may take several if pinched really bad though but shouldn't be weeks). Give it time to heal, don't pull or prod the injury other than need be checks to make sure blood flow is still good in the leg and its not an issue otherwise. Dragging is no good and can cause more damage than the initial issue. If the leg is held up and can clean/care for itself as normal, may make you a good pet but not breeding or show or a rabbit I would place with some one else. I do not know what purpose you are raising your rabbits for, nothing bad meant by any thing. Personally, because I breed for show and am starting to keep those not show/breeding quality imo for feeding purposes, I'd keep to see how turns out and term cull when big enough to feed if the injury did not heal enough to be a good breeder or show prospect for me. Chances of a complete recover 50/50 shot, not seeing it can't say better or worse odds and then never know. I've seen some pretty awful looking baby legs where they got stuck in wire, cut them out, and by the time they were 2 months old couldn't see any thing.