She needs to be someplace quiet first of all, maybe a dog crate or cage or pen or somewhere where she can be comfortable and have some privacy and protection, but still be able to hear and see her chicken friends. She's probably in some shock. Put her in the crate maybe with some warm towels, or someplace where she can stay warm, but hopefully still be able to see and hear her friends, and leave her alone for a bit.. A good bit. In the morning, see how she is. Maybe she will eat and if so, you can crush up a baby aspirin and offer it in a treat, or stir the aspirin into applesauce or yogurt and then mix that into crumbles. She can have a baby aspirin three times a day and it will help with pain and inflammation. Of course, if you have access to a vet that can help you, that is always best. Chickens can be remarkably resilient, but she will need some TLC for a while. Don't let her run with the flock until she is acting much better. The wing might not be broken, but let her rest for a day or two before you start trying to see if it is broken. If it is, it is. It should heal over time. She just won't be able to fly and she might have to be in confinement for a while. .