Basic shelter doesnt work in the freezing months of winter....any ideas to keep kitties warm and out of elements? Styrofoam and rigid insulation boxes are ok, but its difficult to keep dry in the snow and wind. I like the chicken coop shed, making it airtight and perhaps wrapping or draping it with solar heating material-hmm, it would that work? Cant be too big, this is to be placed in semi-private view. Cost is a concern too!!