5. Address the envelope. In the lower right third of the envelope, write the name of the person you are sending the letter to. Write the company name on the line below that (if there is a company name).
Once inside a new host, it takes approximately 6 months for the larvae to mature into adult heartworms. Once mature, heartworms can live for 5 to 7 years in dogs and up to 2 or 3 years in cats. Because of the longevity of these worms, each mosquito season can lead to an increasing number of worms in an infected pet.
Certain forms of heartworm prevention may be harmful to dogs that are heartworm positive. Giving your dog heartworm prevention is an ESSENTIAL part of being a responsible dog owner. In addition, it is safer and less expensive to prevent heartworms than to put your dog through heartworm treatment for heartworm disease. Heartworm prevention costs about $35-$250 per year depending on the size of the dog and the brand of prevention chosen.