Take him out last thing at night so he can make himself comfy ?
I have to take mine out - wimps - they won't go if I don't accompany them. Yes, its freezing and yes its dark. But Keeper's close-up vision is going going gone and he hates excursions into the night without Mom and although I'd much rather stay indoors, if I want to avoid being awoken, middle of the night there is no option.
Frankly its a small price to pay for the comfort of two old Basenjis.