I have 5 Hamburg ladies and one Rooster ( Gordon.) All about 8 weeks old ...2 weeks ago I noticed that there where feathers scattered inside the coop. Then I noticed that one hen had blood on her behind and her feathers where gone! So a week ago I just sat and observe them and saw that Gordon kept on picking and picking on her. The other hens joint in and picked on the poor thing. I called my Neighbor who has more experience with chickens and she thought maybe they had Mites. She came over to check them out , but we did not see any. I put some dust on them anyway. 2 nights ago I got so mad I took him and put him in with my other Neighbors Hens to give my babies a break. They are doing fine without him and the picking on the butt stopped and there is no more blood. Question : Does Gordon need more time away from the hens ? Give him away ? Why is he doing this ? What to do ?