Good advice from everyone so far. I agree. Look for any hidden puncture wounds or under wings for cuts. Keep her in a quiet calm area. In a few hours, offer water and food. Let us know how she gets along.
One of my hens was chased and hurt by a dog. She was skinned up and had many missing feathers, and limped for a few days. She healed fine without special treatment, but went into a molt immediately and did not lay again for several months. When she started laying, her eggs were either thin shelled or shell-less from then on.