Potato Hound
Some people have dogs that do useful jobs like herd sheep or find truffles. Arrow digs up potatoes from the garden. We had a patch of potatoes that self-seeded from the remains of the compost heap. Last year we harvested them and this year there were enough left to grow another small crop. I'm not sure if potato digging is a useful activity for a young dog. He doesn't eat them but most emerge badly scarred with claw marks.
Here he is, resting after his labours.