A year or two ago we had problems with the boar getting a bit sunburned. Being a lazy male he was not inclined to dig his own wallow, so I got the shovel, chose a nice spot and dug, and dug and dug. During this time he raised an eyelid to see what I was doing then continued snoring. After some time, a great deal of sweat and swearing about lazy animals ( the sows always dig their own, Hilary is a master of the perfect wallow) .... I trudged to and fro many times with buckets and bidons to fill the hole from the stream.
Finally finished, I collapsed onto a bidon to wait for the boar's inspection. He lazily heaved himself up, waddled across, stuck his nose in the water, gave me the sort of look that needs a nose longer than his to look down satisfactorily - turned to his water trough, overturned it, laid himself down in the resulting puddle, and sighed loudly.
Moral of this story, use spray on sun tan lotion and let them dig their own wallows!!!!!