I have a barred rock pullet that came up lame out of the blue about 2 months ago. Her joint on the bottom end of her drumstick ( sorry I don't know what else to call it ) is swollen and has been the whole time. We brought her in the house and babied her when this first started as she was very lame. In a couple of weeks she was putting weight on it again but still limping. I figured she had just hurt it jumping down off the roost. Today she is once again profoundly lame on that side and the swelling is now also in her leg and foot. The bottom of her feet are clean with no cuts or bumblefoot. No sign of scaly leg mites. She has become a great pet but I don't know how to fix her problem. No one around here treats chickens. You can see in the picture how swollen the joint is. Anyone have any idea what this is and what if anything I can do about it? Its obviously painful for her and I hate to see her suffer. I also don't want to cull her, she has become such a pet. Do you think a course of antibiotic would be in order? If so, what would you suggest?