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.
Heartworms are transmitted through the bite of a mosquito, so all dogs and cats should be on heartworm prevention year round. Treatment is available as a once monthly oral tablet or biscuit, as a once-monthly topical liquid applied over the shoulders or as a 6 month injection that is given twice a year.eartworms are transmitted through the bite of a mosquito, so all dogs and cats should be on heartworm prevention year round. Treatment is available as a once monthly oral tablet or biscuit, as a once-monthly topical liquid applied over the shoulders or as a 6 month injection that is given twice a year.