joints

I have a 6-month-old doe fawn with swollen joints ("knees"). Her joints have multiple soft tissue nodules that are warm to touch. She has difficulty getting on her feet from a lying position, but once up she can walk. No loss of appetite or any other symptoms. Any ideas on her diagnosis and...

We have a fawn that was born the second week of May. She has been doing fine to this point. Tonight went out to the pen and she wasn't getting up. Forced her to get up and it looks to me like her joints are stiffening up. Looked to be walking on her toes rather than her pads. It looks like she...