Hi, I bought some chickens from a man today, and he showed us some guineas he had. They were 2 weeks old. The kids wanted some, so I bought 3, one each of the kids. I let the kids hold the box on the way home and one of them must have been a little too rough with a chick. It's leg is hurt. When it tries to stand up, it's leg slides out from under it. It's breathing a little heavy now. Is there anything we can do for it?