How old is she, and are any of your others affected? Is she still laying? My heart hurts for her discomfort and I'm certain you'll do the right thing. Good luck.
I have only 2 ISA Browns. They are about three weeks old, and are still inside the kitchen with 2 barred rocks and 4 RIR. One has golden feet, the other, a dull, pale tan'ish. They ll appear to be healthy, and wanting OUT NOW! What's up with the fot color? AND, why can't I post a picture on this...