Hi Susan, sorry to hear about your hen. If this were my hen, I would first try to determine if her leg is indeed broken. If she does have a broken leg, I would dispatch her immediately to end the suffering, then promptly skin the chicken, trim off the breast meat, quarter the legs, then bury or
compost the carcass. This method eliminates the step of eviscerating the chicken. Or, also eviscerate and save the carcass for stock. If I determined that the leg is sprained, I would do nothing and keep an eye on her looking for improvement over the course of a week or ten days. I've had limping chickens before, I did nothing, and they healed on their own. I hope this helps!