I have a chicken who has been unable to use her left leg for about two weeks now, I've been monitoring her closely but she isn't improving. I decided to leave her in the coop as she only lives with one other hen and she seemed to be resting her leg just fine being outside. I've looked over the leg and can't seem to find any obvious injuries. She is eating and drinking normally, laying eggs and doesn't seem to be sick. She moves about as best as she can, she can still get in and out of the coop and into the run but she does seem to have some trouble. I'm just not sure what I can do for her or what may be wrong. She can still be a fairly normal chicken but I'm just not sure if it's cruel to keep her with just one functioning leg.. if she is in pain or something. Anything I can do? Any suggestions?