Right now its 30f here, super windy damp, and colorado low heading this way 4-6 inches of snow possible friday night.
I was just outside, and even in an uninsulated non heated shed, it is much warmer than out in the open.
All of our old tyme relatives never heated birds, no electricity on the farm. Lots of bedding straw, out of the elements , keep as dry as possible, birds can handle way more cold than You and I could ever handle.
No offence to anyone, but this topic is beaten to death in many different threads, with a lot of different posters. Now i know yall are worried about your little feathered babies, but they be tougher than humans, and unless you are going through major sub-zero f temps, let em adapt, keep em fed, keep em dry and out of the drafts and rain and snow. They will be okay for the most part, keep the water dish open, that is what needs the heat....