this morning after letting the girls out, I move the tractor. we have been letting our girls out for about a week now and bout 10 mins. after sunset, they went to bed. same thing every night, no problem. the girls have exploried all around the house. they found TW's rose garden. scratchy, scratchy, munchie bugs and other wonderful stuff. they even picked bugs off the bushes. then each evening they would walk back around the house and get in the tractor for the night. so today I thought that it would be good to have the tractor close to the rose garden, so I moved it. only thing wrong, I moved it after the girls got up and went out. all day they would walk around the tractor, they even went up inside for a short time. about 8 PM, when they usally went to bed, I went out to shut the door. looked inside, no chicks, they are no where in site. I walk around where the tractor was, there they were doing the "we want to go to bed" cluck. we ended up having to roll the tractor back around to get them in bed. tomorrow, I'll move them before they get out. see if that works.