This is the greenhouse heater I referred to earlier in this post, I actually think the warmth from it made him uncomfortable, I would often come down on really cold mornings and he would be asleep on top of his kennel, It was only set to come in really cold temp and only set low.I built a ply bed box and had a hinged base, underneath it I left an 8” deep box where I placed an electric tube heater with a thermostat so it would only kick in when it was low temp, it worked well and was cheap to buy.
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