Enlarged joint

[BzosChickie4971]

Is there anything I can do for this baby's leg? Other than the bum leg she can't walk on, she's a healthy active chick.

 

[Eggcessive]

She may have an injury or a slipped tendon in her hock. Poultry Pedia Podiatry is a good website to read about slipped tendons. Leg bone deformities can be common in chicks, and the hock tendon can be problematic as the chick grows. A chick chair sometimes can be helpful to rest the leg. Just Google "chick chair" to see pictures. Here are some links to read:
https://www.backyardchickens.com/t/...chick-anyone-ever-try-to-fix-this-experiences
https://sites.google.com/a/poultrypedia.com/poultrypedia/poultry-podiatry
http://www.thepoultrysite.com/publications/6/diseases-of-poultry/220/slipped-tendon-perosis/