We had a blind chick a few weeks ago that we tried to save but she eventually passed she was a barred rock. Well we had another that hasn't been gaining weight but I kept thinking she was probably a midget chick. Well tonight I decided she probably was getting to be too small to run with the big chicks and that I should put her in with the bantams so they were more her size. On my way of carrying her I decided probably not a good idea just because of contaminating the bantams if something else might be wrong so I just didn't feel comfortable to do it. Although I am sure it would of been fine, but I would of felt awful if I was wrong. So then she had pooped on me so I went to grab a paper towel to clean my hand and her up, that is when she started struggling for a breath. She was nodding her head and her chest was expanding and contracting hard and her beak was opening trying to get air. I looked at DH and said she needs to be culled. He took her outside and I told him just do it and don't tell me about it. I feel it was the right thing to do, I don't want any of them to suffer, but I still feel bad. She was also a barred rock.