HELP! My DH and I are new to the backyard chicken keeping and everything has been going wonderful up until 4 days ago when we lost our first bird with little warning. As of today, we have lost a total of 4 ( and one that isn't doing so well) ten week old hens and 1 fourteen week old hen. I have cleaned out the coop, changed out all water and food and cleaned the containers. I'm at a loss. All I have noticed is that shortly before they die, they become weak and their wings are droopy and they sleep a lot. Any suggestions or advice would be greatly appreciated!!