I agree @dd33 I never let him spend the night outside. What I was saying is he doesnt want to spend the night outside during winter.
In summer time he only wants to be outside and I allow it but then theres about a month of conditioning again in the autumn to get him used to sleeping in the box again. I leave him on the ramp and he runs inside to hide from me. After about a month maybe less, I find him in his box every evening without me having to put him.
I see your point about being intelligent enough to seek the warmth, perhaps he is only using the box for shelter.
In summer time he only wants to be outside and I allow it but then theres about a month of conditioning again in the autumn to get him used to sleeping in the box again. I leave him on the ramp and he runs inside to hide from me. After about a month maybe less, I find him in his box every evening without me having to put him.
I see your point about being intelligent enough to seek the warmth, perhaps he is only using the box for shelter.