I have seen a thread or two on ducks & cold, but not about cold below 0F (apologies if there is one out there & I haven't found it yet!). I have 2 khaki campbell ducks who sleep in an uninsulated plywood house w/a small open door under our chicken coop. We give them straw (which the chickens promptly spread all around) & they have been doing fine with our winter so far (we are coastal Maine), BUT we are due to get below 0F temps at night this weekend. I'm trying to figure out if I need to seek out & stack some straw bales around their house (or some such plan to increase insulation), or just give them a lot more straw inside their house …. If I had it on hand, I wouldn't hesitate! This week has been hard with the adults in the family sick, so I am unprepared. I know I'll end up doing something extra to insulate the house (even if temporarily … less than 0 is COLD!), but thought I'd see what others' experiences have been anyway & what others have done in a pinch. Just note - I DO care about my ducks & will take care of them! Thanks!