We live in SEOK , in an old double-wide(yep) and use a wood stove as primary heat. This dump has 3/8" drywall and fiberglass batting for insulation. It works just fine. If you are building, use spray foam as your insulation. Way better than fiber, blown in chunks, or roll insulation. It's...
Tree squirrels or ground squirrels? Big difference. The 'Squirrelinator' listed above is for ground squirrels, not designed for the tree rats. Do not eat ground squirrels. They are not meant for human consumption. Cats, dogs and other animals are good to go feeding on them, just not you.