Hm, I don't on this phone. It's a hanging waterer. It could be ventilation I guess. He has 9 chickens in a small shed (no ducks), but they have a big run. I'm not sure if he shuts them in at night or not. He has a window in the shed, but I don't know if he keeps it open 24-7.
Haha! It feels like Canada sometimes! It's totally fine. I think the coldest we had that I remember (past couple years) was minus 30. I live in SD.
It might be ventilation. How high off the ground do you think the waterer is?
Here, the record 2-3 years ago was -45°C. With the humidity of Fleuve St-Laurent, getting out in that weather was dangerous.