And they were NOT at any stable; either!
Wuest’s literal translation of the New Testament renders the term commonly rendered as “inn,” as “caravansary.”
It was the rough equivalent of today’s motel. The horsepower being actual horses (and camels etc.) there was provision for them. Looks like there was no more human quarters but they were told fine, they could stay in the animal quarters.
So it would be KIND of a stable. By the time the Magi appeared they had moved on to a house of some kind.