Couple winters ago when I decided yep I would keep the chickens I bought a plug in heated waterer, Best. Invention. Ever!Yeah, if you get really cold then this doesn't work. But if it doesn't, then it's wonderful
I already have a water trough de-icer for the horses water trough, so I know the value of a water de-icer. It gets to -30c regularly here in the winter, and even in the barn at those temps it will be -20c easy.
Everything in the barn is set up for winter, it is usually miserable here from mid Oct to at least first of May, and I detest winter soon make sure it tolerable in the barn for me and the animals.