I have 15 rir pullets that came from Meyers and they are afraid of any thing they see. When I let out in the morning in a 20x20 run they go under the coop and spend the rest of the day there not coming out until all most dark. If I give them bread they run out to get a piece and right back under the coop. My pullets are 13 weeks old and I have had them from the time they were 3 days old. I am wondering if they will out grow this behavior or do I need to get some other chickens. I would like to free range my pullets but if they see some one or some thing they are gone. Thank you for your help.