I had the smelly problem too. I made room in one of my sheds and took a shipping crate and cut it in half and made a top for it and put a light in it. Then they got too big for just the box so i moved it outside, cut a 18"x12" hole near one corner and made a little run out of cut down tree branches and wire for them.They have a lot of their feathers now - but I assume it will be a few more weeks for them to be "fully feathered"?? I've never had babies this early in the year - sorry for the seemingly dumb questions.... They are getting pretty smelly in the house!
Angela