Pigs don’t pull sleds. They don’t hunt. They don’t play with children. They can’t manoeuvre a flock of sheep. They won’t even try to ward off a bear. They’re bad at sniffing truffles, because they eat them. They won’t run ahead of a fire engine, clearing the way. And they most certainly won’t cuddle up in camp.

Dogs are extremely versatile and have helped humans over thousands of years. Pigs, on the other hand, are tasty.

It’s not that arbitrary.