Insulation in. Chicken coop - necessary?

[Golfing Chicken]

It's actually hard to allow too much cold air into a coop. Try to avoid excessive drafts but keep in mind your main enemy is moisture. Chickens are very well insulated but moisture in a coop leads to frostbite. My trusses are open to the air. They did fine when our temps dropped below 0 two years ago for 2 weeks. Unless you're in the arctic, don't bother heating, either.

Thank you