I am thinking of extending the winter or off-season coop run with the tractor that my gals will be in for the summer here in CT. I've yet to build either structure, and want to be sure I've got the concepts I want on paper first. I'd like to make a chicken tractor like the one by linked here https://www.backyardchickens.com/forum/viewtopic.php?id=3699 (ie, square fenced in area below sleeping area). But I'd like to be able to remove and store the "house" part of the tractor for the winter and then dock the tractor up against the permanent coop to extend the run we're planning to be underneath the coop. Dimensions I'm working with for the ark are 10 feet long by 5 feet wide by 2.5 feet high for the run and 2.5 upstairs. Adequate for 10 or so hens and maybe a rooster? And for the coop, 10 feet long by 6 feet deep. The coop part will be 4.5 feet tall in front (7 feet tall including the 2.5 underneath) and with a shed roof to 6 feet overall in the back, with the back of the coop being 3.5 feet tall. Since all that run will mostly be in the shade under the coop for the winter, I wanted to dock the tractor to give a sunny area as well. Right now I have no building skills, but my brother the carpenter is coming over this weekend to build the ark and show me how to use power tools. yipee! I hope I can swing everything I want to do! I'm excited to have a plan. So do you think it's possible to build the ark in such a way that the top housing can unlatch from the bottom screened section? And maybe one of the 10 foot long sides will flip up to cover the top part that wasn't screened where the door from roosts/nest boxes down to teh grass below. Or perhaps just make a door in the side (easier than flipping whole side up?) and covering the rest with plexiglass? Ok, I'm not sure I'm conveying the ideas so I guess I'll get to bed and picture it in my dreams.