Here are my thoughts...
I'd put the little ones in first like Ellymay said. Let them get used to it for a few days.
When it comes time to put the adults in, I'd put in some kind of divider. The plastic, small opening chicken fencing could be put up temporarily to keep the adults and kiddos separated at first. Then you can start to let the little ones have access to the adult side by raising the fence between the 2 sides slightly - just high enough that they can get under but the adults can't. You want the littles to have a safe place. In the chicken world, the older ones WILL attack the little ones at some level until things get sorted out so they NEED to have a safe place.
Another thing that could work well.....
Leave the older ones in the barn at first and continue to let them range. After the littles get used to their coop and you begin to let them go outside, you could have the temporary fence outside the coop with the same thing as described above - raised just enough that they can get in but the elders can't. Then the littles will come out and begin to mingle with the olders as they get confidence but still have a safe place to go. After seeing that they are all getting along together on range alright, take down the fence and let the olders join the youngers.
OR....
If that new coop has 2 doors to the outside world even better. You could put them in with the divider inside, and give the littles a safe pen outside as described above. Then they can each get outside with a little divider on the outside to keep the little ones safe until they integrate at which time you can remove all the dividers.
Those are just a couple of ideas.
Plastic netting looks like this and you can get it at Menards/Lowes, etc.
http://www.lowes.com/pd_157764-1311...t&pl=1¤tURL=?Ntt=poultry+net&facetInfo=
I'd put the little ones in first like Ellymay said. Let them get used to it for a few days.
When it comes time to put the adults in, I'd put in some kind of divider. The plastic, small opening chicken fencing could be put up temporarily to keep the adults and kiddos separated at first. Then you can start to let the little ones have access to the adult side by raising the fence between the 2 sides slightly - just high enough that they can get under but the adults can't. You want the littles to have a safe place. In the chicken world, the older ones WILL attack the little ones at some level until things get sorted out so they NEED to have a safe place.
Another thing that could work well.....
Leave the older ones in the barn at first and continue to let them range. After the littles get used to their coop and you begin to let them go outside, you could have the temporary fence outside the coop with the same thing as described above - raised just enough that they can get in but the elders can't. Then the littles will come out and begin to mingle with the olders as they get confidence but still have a safe place to go. After seeing that they are all getting along together on range alright, take down the fence and let the olders join the youngers.
OR....
If that new coop has 2 doors to the outside world even better. You could put them in with the divider inside, and give the littles a safe pen outside as described above. Then they can each get outside with a little divider on the outside to keep the little ones safe until they integrate at which time you can remove all the dividers.
Those are just a couple of ideas.
Plastic netting looks like this and you can get it at Menards/Lowes, etc.
http://www.lowes.com/pd_157764-1311...t&pl=1¤tURL=?Ntt=poultry+net&facetInfo=