My ducks were just as dumb as yours apparently. They have a huge coop, plus a run-in where their food & water are located. There is also a repurposed child's playhouse out there were I padded the ground inside with a thick layer of straw. Did my ducks use any of it? No... Their dumb a**es squatting down in the complete open and shoved their beaks into their feathers. Luckily no one got frostbite but it was just senseless in my opinion. I think I'm of the same opinion as you... I'll just lock them inside the coop next time and not give them a choice. My only issue is water. I'd have to rig up a heated waterer for them inside which would mean buying new stuff. Their current water bowl is a large rubber tub with a heated metal ring that keeps it from icing up. I wouldn't want to put an open water source inside their coop during a deep freeze. Too much moisture potential there....Just seen this so obviously late on a lot but I learned a lot too. I’m in western Illinois. I kept reading how chickens are animals and would figure out to get out of the weather and go into their houses. WRONG. I gave mine a choice before it got real bad. Half of the chickens went outside and stayed ALL day. Granted they were somewhat sheltered from the wind but it was still too cold. The ducks came out and went under their house where they were getting hit directly by the wind. All of these guys had windbreakers but none were smart enough to figure it all out. So lesson learned….if it gets this cold again…don’t let them decide.
And I too had snow going into my coops. I ended up putting plastic over the ventilation in both the duck and chicken coops. I was able to stop a lot of it but what I did was take the plastic and cover the openings and staple the 2 sides and the bottom. This left the top open to keep air flowing but slowed the wind down and stopped the snow. Unfortunately the way the duck coops ventilation is, I wasn’t as successful. There was snow all over inside their coop. So that night they came inside the house for a few days until it warmed up and it wasn’t such a shock. However our house was cold anyway. We just bought the house last year and with it being so flat we took direct hits to the house. No windbreakers and the trees we put in to help aren’t big enough yet for that. We had snow blowing into one of the old windows we hadn’t replaced yet. Anyway, we replaced the bedding in the duck coop and I now have a better plan to keep snow out of the coops but also keep ventilation. But with 60mph winds and snow blowing, if there is ANY opening, it will find a way. I even had snow find its way into my metal feed cans. And yes the lids are tight. Rain won’t even get in them.
I currently have a few hens with frostbite on their combs but that is it for them. My rooster has frostbite on his comb and on one foot. I’m still learning how to treat the problem on his foot. All of the blisters have popped, some of the older blisters that popped shortly after the storm has started turning black. But he is the only one to suffer so much. This shows his foot and the progress so far. I haven’t taken any other updated pictures since that last blister popped. But the swelling has gone down some. He has started using it less than he did when I first brought him in. But that is to expected.