"Bugs bug people, but they can kill sheep. Flies, mosquitoes, and gnats can turn the summer into a time of torture for the livestock. Consider nose flies, for example. If they succeed in depositing their eggs into the membrane of the sheep's nose, the eggs become worm-like larvae, which drive the sheep insane. One shepherd explains: "For relief from this agonizing annoyance, sheep will deliberately beat their heads against trees, rocks, posts, or brush.... In extreme cases of intense infestation, a sheep may even kill itself in a frenzied endeavor to gain respite from the aggravation."4"