Heartworms are one of the most common and serious health threats faced by pets. According to the American Heartworm Society, more than a million U.S. pets are infected with heartworms, and incidence numbers are rising—even though heartworms are easily prevented. To equip pet parents to provide the protection their four-legged family members need this summer and year-round, the American Heartworm Society is sharing five vital facts about this deadly threat.1. A single infected mosquito can spread heartworms to multiple pets. Heartworms aren’t spread from one pet to another. Instead, they are transmitted when a mosquito feeds on an infected animal, such as a dog, coyote, fox, or wolf, then later feeds on other susceptible animals and pets. Within months, heartworms grow from tiny lar
