With a fracture fixation, his future range of motion and use of the leg can sometimes depend upon how well he's looked after during his initial post-op period so if you can't find an adequate, caring person to watch him, perhaps the vet hospital can board him and watch him at first. He should never be left alone in a crate or pen after this type of surgery while you are at work until the vet clears him to spend time all alone.
__________________  Jeanie and Tibbe One must do the best one can. You may get some marks for a very imperfect answer: you will certainly get none for leaving the question alone. C. S. Lewis |