Nine week olds won't use roosting bar at night, how do I teach them?

[Bush Farms]

My 6 week old Buff Orpingtons won't go in at night...I have to go out put them on their perch then lock up...I figure they will get it soon..only been outside a week now

and yes they just huddle together in the corner under I put them to bed

 

[trudyg]

My buff orpington (I hope) won't go in at night either. He's just chasing those bugs, great big black ones, long after all the others have settled down. He's the one I have to put in the coop. All the others, at 5 weeks, just decided to stay on the roost at night--now it sounds like a pillow fight in there with them getting into the spot they want. Once I close the door and it's really dark in there it's quiet as a church.

 

[Bush Farms]

I have to announce....today is day 2 my babies have finally learned how to go to bed...I'm so proud of them roosting...7 weeks old tomorrow