Because of unusual weather and our mobile lifestyles, ticks are now found in every U.S. state. These bloodsuckers hang out on vegetation until they latch onto passing animals, where they can cause blood loss. But even more dangerous are the organisms that just one tick can pass on to your pet.

Many dogs are infected each year with tick-borne diseases, and the risk is rising. Early signs of disease may be subtle but can become severe and even deadly without treatment. Blood tests that screen for disease in dogs are recommended annually. Frequent body checks are also important for prompt tick removal, but ask your veterinarian how it’s done.

No product repels ticks, but several kill them once they attach. Some products are toxic to cats and other animals, so check with your veterinarian for advice.