Look what I built today for the boys. It's 6' by 8', countersunk with a chicken-wire top and handles to lift the wire. I know it's not a professional job, but it works. They will still come in at night in their 4' x 4' with mister and heat, and they'll be in when I'm not home as well, but I'm kind of proud of what I made. I will be planting in that pen, and I will sink in a larger water dish for them as well. Any other suggestions? Oh, and they will have two hides built for inside as well. They are Red Foots - about a year and a half old.