I used Gorilla tape to secure the panels to three sides of the hives; the salesman assured me Gorilla tape is much stronger than duct tape in cold weather. It's not very pretty, but it was fast and easy and didn't upset the bees with hammers or screwdrivers. I left the south-facing sides uncovered. They need ventilation and it is better if the hive doesn't get too warm or the bees will be more active and use up their honey stores too fast.
Fortunately, the coop is subdivided into three rooms with several levels so the birds can claim their own space. The largest is the the room on the south with lots of windows and roosts on three walls. Most of the birds sleep here at night.
The four cows are consuming more than 3 bales of hay a day, plus a bit of grain. That's more than twice as much as last year when we only had the two pregnant cows, and it was much colder last winter. But Lariat and LaFonda are both pregnant and still nursing their calves - I guess it it takes a lot to feed these growing calves.