Fleas feed on the blood from animals, potentially causing anemia and transmitting disease, and pets can pick up fleas at kennels, grooming shops and outdoors, says AVMA President Dr. John de Jong. Scratching is the primary sign of a flea infestation, but other health issues can cause itchiness, too, and a veterinarian can confirm the cause and recommend treatment and prevention methods, Dr. de Jong says.
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