How do maggots kill sheep?

Maggots are the larval version of flies, a class of insect with two wings and six legs. They are extremely hardy and survive by eating necrotic (dead) tissue. To kill the maggots you will need a veterinarian's assistance, most likely with surgery involved. The maggots themselves can be cleaned out with some warm salt water and a pair of tweezers, but the dead tissue left behind also needs to be carefully removed to allow the dog to heal.