Freezing weather and ducks?

[Klatimer]

What do you guys do for you ducks when it’s negative degree outside for this tundra we call home?!? We live in Ohio and have 8 ducks. This morning it was -11 degrees and I refused to let the ducks out until later in the day. I refreshed their bedding last night and I give them warm water and a bucket that has a heater. What are other things you do?
Would you put a heater in your duck coop during (ONLY) this weather?

 

[cheezenkwackers]

I keep 2 seed starting mats under my 3 nest boxes (large dish pans). They are attached to an automatic Christmas lights timer which goes on at dusk off at dawn. I added the mats to stop frozen eggs but it gives them a little heat (but I am not as cold as you). I also added a remote thermometer from Walmart. When I can see the temperature in their coop is much higher than the air temperature it makes me feel better.