The deep freeze currently known as Michigan is not ideal weather for our ladies. We suspect that while we were in Marquette returning a cousin to Northern Michigan University that they did not leave their little hut. They practically dove into the feed container when I put it in down yesterday! I also suspect that the cold weather makes them hungrier just like humans. Trying to stay warm requires energy, which requires food.
We are also considering giving them a hot water bottle or rigging something that will radiate heat. No electricity runs out there at the moment, so we won't rig a light bulb for them. We are considering starting a handwarmer in a jar and placing it in there with them. A little strange, but so far the best idea.