Thanks, katharinad and duckyfromoz,
I am doing the best I know how, and so far we have not had extremely cold (I am thinking below 20F) temperatures at night. Days are in the 30s and 40s F right now, nights have been in the 30s F, tonight expected to be about 25F. I am thinking ahead, want to decide how I will know to put them into the basement at night instead of the unheated (but double-walled, insulated with a plexiglass ceiling/roof) house with a foot or so of litter with four inches of straw on that. I have been leaving their sliding door open about a foot wide so they can go out to the veranda and stretch their legs and drink at night. They nap for a while, then get up and walk around and chat with each other, then nap some more, at night.
I put a piece of luan on one side of the veranda this week, and bubble wrap across the top of the veranda. Next week I plan to look into a sheet of multiwall, a clear insulated panel often used for greenhouses (lets light in, is transparent, but insulates a bit). If I get the three long sides (two sides and the top) of the veranda shielded from wind, I think that will help keep the house a little more sheltered. I could also cover the end of the veranda (which is the door) with 6 mil plastic.
I want the place well ventilated, but I am not sealing edges, so I think they will have plenty of air, and the veranda door stays open during the day while they are in the day pen (that way they can run to the shelter of the house and veranda any time).
They have been louder since the weather has turned colder. They call more in the morning, greet me more loudly when I step outside, and call (for me?) during the day.
I think they are fine right now. I just don't quite know where I am going to draw the line. I would have them indoors if the wind were howling and it were 10 F. But between that and 20 F with little wind, not so sure.
A couple of my runners are molting. Sheesh. That is another concern of mine. Again, so far they seem fine. I have an indoor/outdoor thermometer hooked up on the side of their house so I can check the temperature inside (at about 4 inches above their heads while they are lying down). It has not been below 36 F in the mornings when I get them their breakfast and let them out into the day pen, even when it's been closer to 30 F outside. Once they all go out, the indoor temperature soon drops to the same as outdoor.
And everyone is walking fine, eating fine, acting normal.
I give them a few cups of maintenance pellets, free choice oyster shell (still get three eggs a day), six handfuls of rolled oats, two handfuls of dry cat kibble and it takes the ten of them a little over a day to eat it up. I also give them a bowl of salad almost every day (depending on what I have it could be lettuce or sprouts), and peas two or three times a week.
There is almost always at least one duck sitting on the ramp at the door at night, instead of inside the house. Perhaps she is the guard duck.
I am thinking at some point I will just close them into the house at night, as I did when they were outside at three months old and the nights were around 40F. That means no water, no leg stretching (it's a 4'x8' house), but I "tuck them in" around 9:30 to 10:00 p.m., and let them out between 6:30 and 7 a.m.