I just started keeping chickens at my house. The last 3 days I have came home I have had 3 hens laying limp. They are alive but cant move, walk or stand up. They just lay there sometimes on their backs with their legs straight up in the air. I am very worried and my kids are saddened by this. Not sure what is going on but I need to find out. They just started laying eggs a couple of weeks ago. We had 12 now we are down to 9 and I'm afraid its going to get worse. Please help!!!!