Quote: You will want to look at her foot and feel her foot joint, hock and up to the hip. The best way to inspect a chicken or do anything medical to them is to towel them up and lay them on your lap. So set the bird on a bench and with a big towel, wrap the bird up around the wings and breast and lay them on their back's, on your lap, feet up and out of the towel. Look at her pads. Does she have redness on the pad, a poke or hole or a big black spot on her pad? If so, she may have punctured it and has bumblefoot to which you will need to do a surgery. (It sounds scary, but it is not that hard to do and I will lead you through the entire thing.
If there is no puncture to the pad, feel the food joint for heat, redness or swelling. Go further up to the hock or elbow, and then up to the hip, feeling for any swelling and heat. Is it broken? Can she stand at all or does the leg just dangle? Is the leg twisted a bit and possibly she dislocated it at the hip? How high are your roost bars? Heavy breeds need low roost bars. My Aussies are huge and I had all kinds of sprains until I lowered my bars to 15 inches from the floor.
Give her a good inspection and give it your best guess. She may have just come down hard on it and sprained something. If you think this is just a sprain, you should confine her for a week or so until it improves. If they over do a sprain, it can lead to the tendon ripping off the bone, which there is no cure but surgery and she will be lame for the rest of her days. If it is just a simple sprain, you can give her some aspirin. One baby aspirin or a 1/4 of an adult aspirin. The easiest way to give meds like pills is to crack them into smaller pieces and stuff them in a couple of raisins...they never know they are being medicated.
So give her a check and let us know what you think she has going on?