Ok, so how do you know if you have enough venting in your coop? Or maybe I"m asking how do you know if you need more venting? I"ve heard that 1sqft/bird is the recommended, in the summer with the window open I"m sure I have that. But with the colder weather I've closed the window and have reduced the venting to less than 1sqft/bird. I have deep litter that is bone dry and poop boards that get cleaned every couple days. There is no smell at all from the coop. So what signs should I look for that may indicate I need more venting? thanks P.S. I do have other vents that stay open just not as much as I had during the warmer months.