I'm looking at keeping my black lab in a insulated kennel in the bed of the truck with topper. He could be in there upwards of 6 hours at a time. worst case that is. But it beats being in a kennel in the garage for 14-16 hours a day. He'll be spending more time outdoors this year, just to thicken his coat some, but still, wont be more than a 4-6 hours a day. Any advise on how to build, and heat the kennel? I would like to eventually be able to take him along for over nighters, or possible several days at a time too. But, I'll have to leave him unattended for hours at a time.