This bird is 11 weeks old? and you're sure it's a male?Heres some pictures of my Cochins! Hatchery stock....but I love them!
almost 11 weeks old
What should I do about this! He keeps picking his feathers out and the other birds do also! Theres no blood.....but the feathers kinda come in and then they are picked out! He took a long time to get the feathers he has in.....
This looks like what broody hens do to themselves in preparation for setting.
If that is not the issue than I would guess they are crowded or bored or both. If they can free range that would definitely help, if they can't try giving them more space or fewer birds in what they have. I don't know, the more I think about it, it just doesn't look like crowding or boredom - it REALLY looks like a broody hen.