A fox while crossing a river, was driven by the stream into a narrow gorge and lay there for a long time unable to get out, covered with a swarm of horse flies that had fastened upon him. A hedgehog asked if he should drive the flies away, but the fox begged him to do nothing of the sort.
"Why not?" asked the hedgehog. "Because," replied the fox, "these flies are really full and draw but little blood. Should they take off a fresh swarm of hungry ones will come who will not leave any blood in my body."