I have 13 chickens and 1 rooster (by accident ) They are about 7 to 8 weeks old .. the feed store were not sure when they were hatched. I have had them in the garage in a large area until they feathered out and until the coop is finished. I have been letting them out 3 times a day for about 1 hr each time to peck around and get fresh air. The rooster, and 2 other chickens have decided to peck all the others until they bleed and are missing many back feathers. I used blue coat.. poor things look pretty pathetic. I then tried "pick no more" I went through one bottle today (small) I finally built another area to house the bullies and have had no more picking.. when should we try again putting them in together ? should I wait until the poor little others are all feathered out? Any suggestions?? Thanks.. P.S The coop is almost finished.. the plans for a plain simple coop have flown the coop..my husband is building the coop of all coops LOL will post pictures when its done the lumber yard must love him !