A warming pad - like what we can use for our hands in our coat pockets but bigger?
Just looked at that little bottle of "No Ice" that is supposed to keep water from freezing: it was left outside and has frozen solid!
and it was only minus 8C here last night!
I know birds in the wild don't have any water to drink either in this weather, but ours are really thirsty every morning, and I like to give them a better chance than what they would have in the wild
Wonder what they do in Canada? Heated coops?
Update: have posted the question on a Canadian forum, let's see what they come back with.