Chicks panting and not moving to cooler area

[dennarahl]

I have 20 week and a half chicks. The two biggest ones will start panting when they're all sleeping carpet style (all together but not on top of each other), but they don't move over to the cooler side of the brooder. I have a series of boxes connected with doors that is about 5 feet long (man are they entertained by running around through the doors) on one side the brooder fluctuates between 85-90, on the other side its 75-80. Should I worry about the big ones who pant?

Also, I've been leaving food for them to feed freewill, is there a certain age where I should take away the food for part of the day?

 

[AlienChick]

You can try cooling the temp down a bit (perhaps keeping it at 80); it won't hurt them.
Mine are the same age and are brooding inside the house (room temp 70) with no heat lamp (just the EcoGlow).
They don't need a whole lotta heat if they're inside the house.
Also food and water should be available 24/7.