Its been very hot here for a few weeks.. this week its been 107.6 degrees in the shade for 4 days already. My chickens are suffering.. with 7 having died so far. I have lost mostly half grown chicks and young adults. They are healthy one day.. then the next they are really lethargic and slow and then they die the same day. I have been spraying water on the ground the make it damp.. and also have a sprinkler I turn on a few time a day to wet the birds. They are free range 24 / 7 roosting in the trees at night... and they stay in the shade mostly.. but they are panting a lot with wings held out from the body and a lot have got pale combs. Do you think its the heat killing them or a disease of some kind? Any tips what I can do?