When they were smaller, I kept them indoors in home made cages/pens. As they got bigger and they spent Memorial Day to Labor Day (give or take a couple of weeks) outside full time, I kept them in a 4' X 4' heated cage/box in an unheated garage for the winter. I am hoping this is their last winter in that box. I have plans to have an enterance into the garage for them in the summer and a heated room in the garage for the winter.