As mentioned, it's all about keeping them dry and out of drafts. It's okay to have leakage around windows and doors as long as it doesn't create a draft that's strong enough to open feathers. The more ventilation, the better. Keeping open waterers out of the coop is also a good idea as is removing the nightly poop load and not overcrowding your coop.Hey so I have some 8 month old chickens: 2 buff Orpington, 1 Plymouth Rock, 1 Easter egger, and 1 Ameraucauna. It is supposed to get down to 20* Fahrenheit at night soon and I was wondering what to do to make sure they won’t be too cold. Thanks!