I had 25 8 week olds in the teen ager pen. Today I put them in with the 23 week olds. Seems to be going well so far. 4 of the teen agers are pissing me off. They are avoiding me AND wont follow the others into the big coop. I'll keep you updated on how it goes. They are all staying in the coop while the big girls and boys go out to range. The pullets that are coming into the coop to lay don't seem to mind them at all. A sign of how well this is going to go?