Pig shelters: log cabin?

Hello! Looking for ideas about pigs shelters. Im thinking to build a little log cabin as I have extra downed wood that isnt good for the woodstove anymore.

I also am in winter, so i am limited in construction methods. Im in zone 3a, the great white north of america.

Yes, logs would work, but be prepared, piggies are amazingly strong at lifting things.
If the cabin is not spiked down, they can and will lift it up
If you can find some used metal roofing, it works great laid on edge horizontally as the bottom of a fence, preferably buried 8-10".
This will provide a windbreak and block the view to the "Other side of the fence." (Always the better place)
Piggies are not intentional escape artists (like a dog is); they are accidental escapees.
They root, using the shovel on their nose, and suddenly, they are on the other side!!!  
The horizontal metal restricts the view so they dig a hole to sleep in and stop.

I linked a photo of my winter Farrow system.
I live in North Central Wisconsin.
I source free old large round hay bales.
I place the bales in 8×8×4 hut setting. Use free old plywood/wood for roof then free billboard tarp on top.
Inside I put 6 inches of woodchips, 3 inches of dry shaving and 12 inches of dry straw.
The entire system is composting from the ground goat the bale.
At -10° F outside temps inside will be 35 to 40° due to the heat release from compost. Add a layer of snow on top and drift on side up to 50°  
I place a pc of plywood in ths front and allow for a small door but close it at night if temps go below 0°
I raise, breed 13 sows/gilts have two boars and raise out 20+ feeder in hay huts as well all winter.
Its important to have a good heritage breed if your are over wintering any pig.
I raise Gloucestershire Old Spots and Red Wattles.
Sustainable Stewards Farmstead & Goat Grazing in WI