Hello, yesterday i found one of my 6 hens dead she was a happy one always eating and very nice. in the morning when i let them out of the cope she was dead laying there ! and the other chickens pecked on her ( it was not a nice picture ) . i don't know what happened , or why she died. now 3 of the 5 left don't want to sleep in the cope no more... one i found in my shed and the other 2 on a bench. what should i do? what can i do ? Please help. p.s i don't think nothing got inside the cope since everything is sealed well. - the night before she died she was fine as well.