My chicks turned 3 wks old today I'm finishing up their coop and wanted to ask for opinions about how I should ventilate it. The coop is inside my barn which I've just about finished restoring. New metal roof, new foundation, gallons and gallons of paint, repaired windows and doors, a restored wooden silo, etc.. After all this work, I decided I needed to use it for something other than storing the lawnmower and such. The barn itself is 36x60. I'm building the coop in the corner closest to my house so I will be able to see the run from my kitchen and keep an eye on things. The coop is 8x12. Because it is in the corner, I only needed to build two walls. The ceiling is the underside of the hayloft and is about 8.5 feet high. I used a wooden storm door that use to be on the house. I can have either the screen or window in the door depending on the weather. The door is inside the barn going into the coop, not going to the outdoors. I have one fixed window which is about 36x36 and provides alot of light into the coop. I put in a 12x18 pop door. Now for my ventilation. The walls and window in the coop are air tight. There are no areas for drafts to get into the coop and bother the chickens. For ventilation in warmer weather, I can put the screen in the door and air from inside the barn can exchange with the air in the coop. Also, at the top of the walls, I am planning on putting hardware cloth between the joists that support the floor above and make my ceiling. So, what I need feedback on: Will ventilating the coop into the large barn area be sufficient or do I need direct ventilation to the outdoors? The large barn area gets plenty of ventilation to the outside thru the gable vents, gaps in the old siding, etc.. I'd like to avoid cutting any additional holes in the coop walls to the outside if possible. What do you think? Thanks!