It's getting in the high thirties at night, so I have a heat lamp in the chicken coop. My chickens are only 2-3 months old. They know how to use the ramp to leave the coop in the morning, but they haven't figured out how to use the ramp to get put up at night. I'm worried they are going to freeze or get soakin wet. Every night I am having to scoop them off the ground and put them back in the coop. Is there an easier way? Can I train them to go back up at night all by themselves.