This morning when we walked out to the coop, our Barnevelder was making a strange sound when she breathed. About 3 weeks ago our white Silkie sounded similar, so we treated her with VetRX and also added some to the water so everyone could get it (just in case). We did that for a few days and everyone seemed fine! So this morning we were surprised to hear her breathing like that. Once we treated her, we noticed the white Silkie (who was sick before) was laying around and not following with the flock. We picked her up and she couldn’t even stand. She was gasping for air like nothing I’ve ever seen. Sadly, she passed around 15 minutes after we took her inside. I felt her throat to see if she was choking on something, but I couldn’t feel anything. I feel awful because I must have missed the signs... but I can’t remember seeing anything out of the ordinary from any of our girls. They’re all around 21 weeks and no one has started laying, but they’re very spunky and always coming to say hi. The only thing that’s different is with the Texas heat, they all pant. There’s no swollen areas that I can see, they aren’t sneezing, there is no mucus. Anyway, I’m really worried because I don’t want to lose any more of my flock! Do y’all think it’s a respiratory infection or something else? Any help appreciated!!!