Big Orps need much more room than a chicken tractor. Think of how many hours a day these birds will be confined practically on top of each other while you are at work. Not good , and certainly not fair to the birds .Orps need 10 Square feet of space in a coop, not including the covered run, which should have 20 Sq' per bird.They should be allowed out every day for a few hours to free range.yes they free range all day most of the time and the biggest preditor in my area is a house cat and they are scared to come into my back yard because i have a dog who really doesnt like cats lol. basicly its for them to sleep in at night and while im at work. other than that they are out in the back yard. think that would work out for night use ?