It's hard to believe that something so small can cause so much misery.
Fleas are more than just itchy.
They also transmit tapeworms, which can cause diarrhea or other intestinal problems. Controlling fleas is an important part of keeping your pet healthy, says John Hamil, D.V.M., a veterinarian in private practice in Laguna Beach, California. Fighting fleas has always been a challenge, but veterinarians have recently found ways to make it a little bit easier. One strategy is to use an oral medication such as Program. Given monthly, this prescription drug stops fleas from reproducing on your pet.