chick can't use her leg

[selaines]

Our month-old chick now cannot stand on her right leg. The knee joint is swollen. I've been told that this is a tendon problem. There are no visible wounds. She is eating and drinking. Help.

 

[Chickensfan]

This may help,
https://www.backyardchickens.com/threads/swollen-knee-joint-wont-put-any-weight-on-leg.405661/
and this,
https://www.backyardchickens.com/threads/swollen-ankle-and-knee.444218/
and this,
https://www.backyardchickens.com/th...-swollen-knee-and-possible-bumblefoot.728565/
and this,
http://www.chickenforum.com/f12/swollen-knee-joint-6446/
I suggest that you look into bumblefoot a little and then check the bottoms of her feet for signs of it.
I hope this helps,
Marie