Finishing the schematics on my 4x8 elevated chicken coop. On my gable ends I have some windows which will allow light and are openable for cross ventilation. On my "long" walls, I was thinking about making a long narrow vent, perhaps 6in by 6 foot, on both sides. Of course it would be protected with hardware cloth to keep critters out. I would do this on both sides. Included is a rough blueprint showing what I mean. Any thoughts on this? How would this work being open in the winter to allow air movement without being too drafty? Too much ventilation??