I have 7 mixed breed bantams. It's been high 90's and into 100's this week and they are finally getting used to it. The one chicken, however, is doing poorly. I'm not sure what the problem is. Her vent looks clean. Her nostrils are clear. She stopped panting like the rest of them, but I'm not sure that she is eating or drinking. She is preening minimally. While the rest of them are running around and looking for food and chasing bugs (they're free range), she's standing some where. She is often alone while the others walk off and she walks very slowly after them eventually. It's been like this for a few days now and she definitely is feeling lighter than the others. They all seem approximately 4-5 months (I bought them as pullets at an auction, so I don't know how old they are exactly). The rooster just began crowing yesterday morning for the first time.