I see it has been 6 days since your post, but if the temperature is getting that low, a garage or shed would probably be best. You don't want your chickens legs freezing with all the air coming through the cage.I'm going to get a wire cage for her today. The temps will be dropping into low 30s the next few nights do you think I should cover the cage with a tarp at night. I was gonna bag to set it up in the run.