I have 7 four week old chicks. One RIR is looking sick. Its feathers look like they are falling out or maybe just not coming in right. The rest of the chicks look great. If I can figure out how I will attach pics. I am feeding medicated chick starter. I have had them for 2 weeks now. Just in the last two days have I noticed him looking different. It never had much of tail feathers. I keep them in the coop at night with no heat but it has been very warm here and the coop is well built and no drafts. I have been letting them out for short periods of time in the run. It is all grass. It is hard to tell in the pics but look by his neck and under his wings. Also he/she picks at his feathers all the time. I looked for mites and saw none. Any help would be appreciated. Should I remove him/her from the others?

