Hello I really need some help guys. I have around 160 chickens and they are starting to die. A few weeks ago we found one dead, then we thought it was because of age, then we found another one and another one, and about every week or 5 days we would find a dead chicken. We thought it was because they may not be drinking enough to water so we made sure that they would always have food and water, but we keep finding dead chickens. We may think that they are suffocating themselves when they are sleeping at night and when they wake up they are loopy and go outside for a few hours then die because lack of air, ( they are free range chickens so they are outside during the day and inside at night). We also had 11 chicks big enough to be outsid,. this morning when I let them out they were all ok and they had food and water, when I got home from school I found 7 dead inside the coup. There were 5 sleeping together in one egg laying nest and 6 in another the night before so they weren't to couped up. And as I said, in the morning they were perfectly fine but when I got home 7 were dead they were also very beautiful EE and BSL and barred rock also some other breeds. Please help me I'm extremely desperate!!