I have a 2 1/2 month old hen that was picked up and seems to be injured by my sons new hunting dog. The older dog protects them with no problems. Anyway the hen showed no visible injuries but limps now. The leg is in the correct position, not floppy, twisted etc. She is slowly limping around. She is not being pecked on by the other girls but I'm watching just in case she needs to be separated for safety. What can I expect?