Very informative site here and lots of excellent advice! Thanks all!....Here are my questions: I intend on starting small, maybe 5-6 birds, and leaning towards a mobile unit. The Tractors/Arks are brillant ideas and Im leaning towards that, though, I live in Vermont. Most of the designs I have seen look great but I question how they would do in the cold and snow here. Are there any good versatile designs out there that would work for me? Is it recommended to wire the bottoms with 2"x4" wire for predators and to discourage excess scratching but still allow grazing? I have seen some of the open floor designs, and within one day the birds have scratched to bare ground, that is not appealing especially if its your yard. My thoughts are this, build a solid mobile unit now and build a permanent insulated coop this summer for them to winter over. How would the chickens take to changes like that if I went that route? I figured in my area and climate, a summer coop and winter coop would be a wise choice and I could give the birds the free range that they want when the range isnt frozen? Or could I get away with a well built mobile unit that I could winterize for the winter? I appreciate all feedback..