I noticed that two of my hens were open mouth breathing today. I do live in North Texas, so it has been getting much warmer, so not sure if it’s heat related. They also kind of make what sounds like a gasping sound every now and then when they are doing it. They have plenty of water and seem to be eating and drinking okay. Didn’t get any eggs from them the last 2 days, but figure that can be normal. I attached the best picture I could get for reference, as I don’t know if/how I can upload a video. My other three hens are totally fine.