Ours was not attractive at all, lol. It was 7 feet long, 3 feet deep and 4 feet tall. That was too tall. It opened on top and it made reaching in to clean or grab chicks too difficult. The only other doors were small (3x4 inch) holes on either end so chicks could come in but adults couldn't follow. Well, adolsecents often did, so they could have been smaller. Those helped with integration. Chicks went outside at about a week old, spent two weeks in the outdoor brooder and began integrating at three weeks. The brooder had no floor and the caging material was chicken wire, with one side being solid plywood because I've noticed chickens get really crazy in a total fish bowl. I opted for chicken wire and not hardware cloth because the brooder was in the run, under cover, and behind a physical fence and an electric fence. The one other thing I might have changed was having a hen sized door. I used the brooder for any number of things, including isolation and brooding hens, but to get any adult birds out, they had to be caught and removed, they couldn't just walk out on their own. Otherwise, an outdoor brooder is a phenomenal idea that you will have endless use for. I demolished ours last fall and haven't replaced it yet, but I have a very large cage and three prefabbed coops that do the job instead.