Muscle Atrophy In Chickens... Causes?

[Weeg]

You can try soaking in a warm epsom salts bath.
It's good that she's feeling better. I'm not sure if restricting her mobility is a good idea. How much does she move about as it is?

She moves around like normal. Doesn't seem to be bothered by her foot, other than a slight limp. I'll do an epsom soak then, and get updated photos.