Self-grilling piglets

We've got two piglets at the house; and I was bbq'ing some steaks in a fireplace; not really paying attention as the steaks cooked, looked over to find that the piglets have spread the ashes out and are carefully grilling themselves. The radiant heat from the BBQ must have felt really good. These two little guys are from two different litters but will probably be lifelong friends. They sleep together and keep each other amused. They'll be back out at the farm in a week or two.