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"Flies are bothersome external parasites that cause irritation and also transfer significant disease to our pets. Their life cycle involves a complete metamorphosis, from egg to larva to pupa to adult. Fly larvae are called \u201Cmaggots.\u201D Agricultural animals, including horses, sheep, cattle, goats and pigs, tend to be more severely affected by flies and maggots than companion animals.  However, flies do cause a number of medical problems for domestic dogs."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.petwave.com/Dogs/Health/Flies.aspx>