This flock is my first flock ever, I have 4 beautiful EE hens and they're around the age of 5 months old. One of my chickens had trouble breathing, you could hear her breathing it was really bad but we took her to the vet and the vet said that she had an URI, and they gave us medicine to help. Her breathing did improve, we separated them for about a week and then put them together when she felt better. It's been about 3-4 weeks since then, and she doesn't like coming out of the coop anymore since it started to snow. I don't think it's too cold out yet, the others are running around in the snow right now, but she still prefers to stay in the coop. Also her comb is redder than the others, which are all still a pale pinkish color. She is eating and drinking and pooping though. I'm really worried that she's still sick and I, as a huge animal lover, don't want to have to put her down, or have her suffer. Is there something wrong with her or does she just not like the snow? Maybe the chickens just aren't getting along? Should I take her back to the vet?