My chickens seem cold- heater?

[sewchick]

I did have vents on my old coop. I just meant the rest was tight. No leaks around the door, walls or floor. The only critter that got in once was a small mouse that my red star proudly killed. I was a little amused by that. But yeah of course there are vents. I thought everyone knew that. They were along the roof edges. My husband built it. He's a builder by trade. Or was.