Heartworm preventive medications come in a variety of forms, such as chews, tablets, topicals, or injectables. Many of these products will protect your pet from other parasites, such as fleas ...

Prescription flea control products typically cost more than OTC options because they protect against more parasites, most importantly, deadly heartworms. Dogs must test negative for heartworms ...

Unfortunately, the treatment and heartworm recovery process is much more difficult than the prevention of these parasites.

Generally, if your pet is treated for heartworm, a mosquito bite won't ... that some repellent ingredients commonly found in human products are toxic to pets, including DEET.