About 10 weeks old. Has been a normal healthy bird up to this point. Now can't put weight on one leg. Seems to just slide out from under him. He can still make it to the food and water and make it up to the rim of the box to roost (about 20"). Doesn't act like he's in pain. I can palpate his leg and he doesn't act pained either. Doesn't feel deformed. I can't find any sores or anything on the leg either. Thoughts? I searched on bumblefoot but that doesn't seem to be it.