He now has almost full control of his leg. The only problem is that he still can't/doesn't want to straighten out his toes; he can clutch things tightly but won't let his foot lie flat. This slightly paralyzed leg problem has been making him walk on the top of the affected foot's toes, which causes the leg to splay inward slightly. It doesn't look like the leg is dislocated, it feels like that leg's hock joint is weaker than the strong, non-affected leg. Its beginning to bother him, as he has been limping somewhat today and standing on one leg a lot.
After more thought, I think I was wrong in thinking that this was Marek's. Judging by his behavior, it seems more likely that he injured his hock (probably by banging it on a roost, catching his leg in something, etc.), and the injury caused temporary paralysis of the toes. This injury may also have caused him to not want to move his toes/foot, and instead hobble around on top of the foot. Unfortunately, the injury probably weakened the hock joint, and the more he walks on his curled up, splayed foot, the more his entire leg is splaying inward and the injury/problem is getting worse. I'm considering making a sling for his leg, and possibly splinting the toes; does that seem like a good idea? Any suggestions as to how to make a good sling?
I've been giving him the St. John's Wort solution twice a day, along with vitamins and electrolytes. He's in a well-bedded cage, with feed and water nearby. It would be so helpful if he just rested, but he continues to act normal and walk around on the wrong part of the foot, doing more damage to himself.
I may post this problem on a new thread, and see what help I can get by doing that, too.