When I 1st got my mature chickens, my husband and I ran around like a comedy routine in the early evening rounding up the girls to put in their new coop. Very anxiety producing for both humans and birds! I read their instinct is to roost at dusk and seek out their coop themselves. I also read to put a little light in the coop and as it gets dark outside they'll seek out the light ... and coop. Chickens don't have very good eyesight. I used a little clip-on keychain light and indeed it worked. Once they were all up the ladder and in the coop, I cut off the light and locked up the coop for the night. After about 3 nights, I stopped w/ the light and the routine was set. My girls obviously go to their coop to roost earlier on winter nights than summer nights. We reside in VA and right now it's between 8-9 pm before they are all ready to be locked in and secured. I've been very diligent though... so haven't yet lost any to predators (knock on wood). Good luck!