I have an established flock of 11 bantams (3 roos 8 hens, of assorted breeds) that free ranges daily. their coop has no pen attached, we just open/close it daily. Last Monday, I picked up a trio of dorkings(LF) about 6 months old. They free ranged at their previous home. I let them out for the first time yesterday, and the 3 decided to head off for parts unknown after about an hour meeting the rest of the birds (and a few squabbles over dominance). We caught the hens without much problem, but the roo decided he wanted to be somewhere else. far far away from here. LOL. what i'm wondering, is how long should they stay in their pen/coop (4x8 pen w/ modified xl doghouse) before i can feel comfortable letting them out again?