I am going to start building a coop for my 5 little chicks. I was going to do something very simple and the measurements will be 6 feet slanted roof (5 foot on one end and slants to 6 foot.. for drainage) and then 4 feet wide by 8 feet long. I was going to put 2 nest boxes inside.. a 4 foot by 4 foot brooder on the other end. I was going to put in about 6 or 7 vents up near the roof area, a window and a door with a window in the door. Is this big enough? If I am going to take the time to build something like this, I'd like to make sure I"m giving plenty of room. To add another few feet wouldn't be a big deal. There will eventually be a decent sized outdoor penned area for them.. about 25 feet by 25 feet.