I am new to raising chickens, I have black australorps that are about 8 weeks old. I had them in a smaller coop inside the barn for the first 4 weeks because it was warmer. The used the inside part at night and the fenced area during the day. When they got their feathers I moved them to an out door pen sort of like a two story chicken tractor. My question is, they will not go inside at night, they all just bunch together on the ground in one of the corners. What can I do to get them to roost inside? I tried putting a light upstairs thinking they may go under it for heat, I tried removing the food from the lower level a couple hours before dark, but they just eat the grass before going to sleep. They will go up and down the ramp during the day no problem, I have food and water up stairs and that is the only place there are roosts. At night I carry them, or try to chase them up the ramp and close them in, hoping eventually they might do it on their own. I have 1/4 inch mesh around the bottom, but I am pretty sure something will eventually get them. There are just too many weasels, coons, mink, opossum, fox, coyote, cats, etc around. Any ideas are greatly appreciated.