More information : my other 3 chickens are just fine. My father put some diatomaceous earth on them just in case it was mites. The two chickens drank a bit and ate the cheese I tried to give them (the blue one wouldn't take her food) The red one seems in a better shape, she walked a bit and ate more. But the blue one juste keep 'falling asleep' and she now is closer to laying than standing. It was hot yesterday (around 25-30°C) I don't know what to do, I need help please.