Brittany, you need more chickens! I have 6 giuneas, 2 turkey hens, 4 roos & 16 hens in a 4x8 coop that's 5 ft high. When I walk in there in the morning after letting them out it's warmer than my kitchen! That's even with the window still half open. They have a nice big run but I like my coop smaller for warmth.