We have a 16-week pullet that presented with a droopy, bunched up wing today. Upon inspection, the underside of the wing, at the elbow, has swelling and scabbing. It's not hot to the touch, there's no seepage, but the entire area around the elbow feels hard and firm, and the chicken won't move it. There are no other signs of injury. I think the injury was present yesterday, but not nearly as obvious (I only spotted a slightly droopy wing in a picture retroactively). She's spending more time sitting on her haunches, but is still eating and drinking and hanging out with all the other chickens. I don't think we're able to buy antibiotics in our state. What should we do to help this pullet? Of the 15 babies we hatched, we only ended up with 4 hens, so we'd really like to keep her!