Hi, I think one of my chickens may have worms. She is a wyandotte and I got her 2 days ago from an auction. I think she should have been laying by now, she has a horrible case of lice that ive been treating and shes not active at all. She always is laying down but i was thinking that was because she has no energy because of the lice or because she was a factory bird and her toenails were way overgrown (she could hardly walk) and her legs cant support her. She has diahrea off and on and doesnt get along with my other hens. Do you think she has worms? And if she does, how often should i give her diatomaceous earth? Also is it contageous to my flock? Please help!