frostic
Songster
Also if you can show how much shade they got and what coop conditions are like lack of ventalation can cause heat stroke if its high heat in the coop. other things can be factors too like bio security. chickens can get lots of problems. Also please post pictures of your chickens comb and other chickens of same breed's comb and describe age differences. this info can aid our lovly chicken experts here on the forums.