"I would definitely wait longer, I think Sheri's point about hers having an acre is a key difference, even though you have a nice-sized run. At least two more weeks, possibly four. RIRs aren't known for their cordiality."

"I should add a p.s. to this, given what others have said.
Yes, watch closely. Our birds have free range of an acre of land, so they have plenty of space. In a confined area they might not be as cordial. Also, different breeds have differing…"

"I usually wait until the younger ones are 18-20 weeks.  Then they can defend themselves and can eat the same food.
They always stay in their separate flocks but tolerate each other OK.
The last time I integrated, the boss of the pullets immediately…"

"My experience has been to be very careful introducing chicks to hens. I'd really gauge it on the chicks size and self defense temperament. If they seem able to hold their own, try it but keep a close eye but if they are prone to being picked on, my…"

"I LOVE that name! We inherited a roo named Elvis. We learned later why he had that name. Sang ALL the time. So he ended up in the pot, but the poor boy was old and gangly, so he had no meat on him at all.
A rooster will only be henpecked until his…"

"I was wondering... would a flock of hens give a new rooster a hard time if I wished to introduce a new young rooster to the flock? I have no rooster at all right now. When I added new pullets to the flock last summer, ChickenStu was bent to kill…"

"Thanks so much for your help!  We will give it a try!"

"Susan,
We recently added four chicks to our flock and had them running around with the chickens earlier than 10 weeks. The hens should accept them readily, given what you've already done. They will follow the larger birds and will learn from them.…"

"Thanks for your help!"

"Thanks so much...I might try this out of PVC if I can find an easy way to attach the hardware mesh.  But wood is a great option too!  Thanks again."

"There are designs and plans for tractors on BackYardChickens.com
http://www.backyardchickens.com/coopdesigns.html"

"Here's one from Mother Earth News.  They used steel but I don't see why you couldn't use wood.
Mother Earth News Tractor"