I have been having the same problem with my new chicks also. They do come down from the coop on their own, just will not go back up on their own. I have to pick each one up and get them back in the coop at night. I tried the treat twice, didn't work for us. Last few nights I put them half way up on the ramp and tapped from behind them and even nudging a few of them til they made it totally in the coop. We haven't ever had a flock learn this slow how to get in the coop. I'm hoping they catch on soon.