Hi! Im new to chicken keeping and I have a 3 day old chick that I believe has been stepped on by a horse. Its leg is shriveled up and appears dead. I think it has a break at the joint. There didn't seem to be any blood on the leg and I don't think she can move it. other than the leg injury it seems in good health and spirits. Does anyone have any suggestions about what to do for it? THANKS!!!!!