The idea of your pet being infested with parasites is a disturbing thought, but it’s also a medical issue that can have serious consequences if not properly dealt with or prevented. Parasites pose a variety of health issues for our pets, who can be very susceptible to certain parasites depending on age, region, and other factors.The cost of prevention is minimal compared to the cost of treatment, which can be expensive and stressful on your pet. Parasites like heartworm can even be fatal, so preventing parasites is of the utmost importance.