In my experience, they do gain that muscle back fairly quickly with normal use of the leg. It does take a while though for them to use it and sometimes they don't because they are used to not using it. If he continues to not use the leg, you might want to look into physical therapy.
Take this time while he is less active to teach him to use stairs or a ramp for getting on and off of furniture. He should be trained not to jump if you can do that. |