Will chickens show when they're overheating?

[eprouty]

It's 95 degrees today. I have seven mixed bantams, and six look fine, behaving just as they normally would. But my favorite fluffy Mille fleur is making a panting motion, so I've brought her inside in the AC (the spoiled thing). Will the other chickens let me know when they're in trouble?

 

[DaniLovesChickens]

It's normal for a chicken to pant and lift it's wings away from it's body when hot. That's the normal way they cool themselves. It's not necessarily a sign of heat stress.
You can put ice in their drinking water and even freeze water in plastic bottles to put inside the coop to keep them cool.