I have a pullet, about 20 weeks old, who won't put any weight on one leg. This has gone on for some time. I have looked several times for bumblefoot, but there is no sign. Tonight I noticed her knee on that leg is much larger than the other one. I can't feel a break or any fluid. It feels hard like bone, but is just much larger. I don't know how long it has been larger, but she has limped for a couple of months and just in the last week started hopping, not putting any weight on the leg. She is a very heavily feathered Brahma, so I didn't find it sooner. Symptoms - Hopping, won't put foot to the ground at all. Eating - Fine, eats with all the rest. Weight is maybe a little thin, but not much. Poop - Normal. I have amoxicillin. Should I give it a try?