Rooster terrorizing flock! Please help

Okay, started with a RIR roo and a white silkie who have grown up together. They are now 6 months old She seems to like him nearby but not too close as he was constantly trying to mate. Last week, we added 4 more hens to the flock: a N.H. Red, BO, another who is black with brown lacing all over and feathered feet, all of indeterminate age but at least 1 laying and a chick who is probably 6-8 weeks. Everything seemed fine. The roo mixed it up a bit with the NH but she won every time.

Fast forward to this week. My Silkie has been sitting in a nesting box all week and I'm not sure she's even leaving to get food and water. Everyone else is hiding in the coop all day as every time they enter the run the roo chases them back in. So, I decided to give everyone some space this afternoon and opened the coop for free-ranging. The NH, the BO and the chick all happily came out to play. As soon as the roo figured out it was freedom time he came out and seemed like he would just scratch and be happy. Then all of a sudden he charged at my 10 year old daughter and chased every hen back into the coop. Having had enough I went out, cornered him, picked him up (no easy feat!) and carried him around a bit. I was worried that he wasn't breathing well after holding him pinned a bit so I let him loose in the dog kennel and essentially condemned him to a chicken time-out. Checked on my Silkie who looks fine, took her out of the nesting box and set her free. Much to my delight she started free ranging, drinking and chowing down at the feeder. Everyone else is now very relaxed and happily pecking around. I think the other hens convinced the Silkie to be terrified of him!

Can I re-train him? Break him of this terrorizing? Or is freezer camp or solitary the only solution? My son is very attached to him (god only knows why!) so I've been patient and tried to make this work. However I'm running out of ideas. It's going to be a LONG winter if he continues on this path.

Any help would be greatly appreciated. Sorry so long, but I felt I should give all the details.

 

At this point he's not even trying to mate with anyone; just chasing them all day long. If I thought he'd fit I'd move him to the dog house coop and put the 2 bantam roos in the large one. How much space does he need? I'm not sure he can fit through the door!

 

Thanks for the feedback. I do have a 5 year old daughter that he has gone after in the past. She now won't go outside if he's out. That's it, lifetime of solitary. If he was just going after people to protect the flock that would be one thing but my 10 year old was on the other side of the yard from the coop/flock!