I have 6 chickens, about 2 months old. 3 light brahmas, 2 easter eggers, 1 orpington. It is only about 83 degrees max here so far - Louisiana. My brahmas start panting in the late afternoon, though they are in partial shady conditions until about 3:00 and from about 3:00 p.m. on they are in almost total shade. My other chickens do not pant, but the brahmas are panting even at 9:00 p.m. when I open the henhouse door to check on them. I have vent holes in both ends of the henhouse, a large egg door in one end and a 12" x 12" screened window in the henhouse door. I also leave their personal door (12" x 12") open until late (around 9:30 or 10:00 before I shut and latch it. I'm wondering if my brahmas are suffering unduly and is this natural for them, and should I use a fan on them? Sorry, I'm new with chickens.