Email Sign-Up Go to Shopping Cart (0)
Most Trusted Everyday Low Prices Pet Pharmacy Satisfaction Guarantee Free Shipping Drs. Foster and Smith Pet Supplies
Save Time! Download our Prescription Fax Form PDF before you go to the veterinarian
Our Heartworm
Flea & Tick
No prescription required for Flea & Tick Control
Ordering Information
Full Prescription
Product List
FREE Prescription Resource Guides
Pharmacy Articles
About Our Pharmacy
Disposal of Unused Medicines

   Learn about Vetco

Heartworm Facts

Drs. Foster & Smith Educational Staff
Heartworm Preventive Comparison Chart 
Wormer Comparison Chart 
Why Vaccinate at Home? 
Phenylbute Powder (Brand)
Phenylbute Powder (Brand)
As low as $29.99
Drontal Plus Tablets for Dogs
Drontal Plus Tablets for Dogs
As low as $5.99
Animax (Brand)
Animax (Brand)
As low as $7.99
Facts you may not know about Heartworm
  • The mosquito is the only known vector for transmitting heartworm.

  • The average lifespan of heartworms in untreated pets is 5-7 years in dogs and 2-4 years in cats.

  • Virtually 100% of dogs exposed to infective heartworm larvae become infected; in cats, this number drops to 61% to 90%.

  • According to the Companion Animal Parasite Council, mature heartworms in cats average 21 cm (about 8.5") in length, while those in dogs average longer than 26 cm (10").

  • Heartworm infection in cats exists everywhere heartworm in dogs exists.

  • A study performed at North Carolina State University indicated that 25% of cats infected with heartworms were solely indoor cats.

  • Heartworms may infect more than 30 species of animals including coyotes, foxes, wolves and other wild canids, domestic cats and wild felids, ferrets, marine mammals, and humans.

  • Prevention is far more effective and less costly than treatment.

  • More than 70 species of mosquitoes are capable of transmitting heartworm.

  • Heartworms cannot be passed directly from one pet to another.

  • Many dogs recover from heartworm disease, but heartworms cause severe disease and sometimes permanent damage.

  • In cats, there is no effective treatment to kill heartworms.

  • Animals will usually test positive for heartworm disease approximately 6-8 months after they were bitten by an infected mosquito.

  • It is much more difficult to diagnose heartworm disease in cats than in dogs.

  • Heartworms affect cats differently than dogs, but the disease they cause is equally as serious.

Heartworm Frequency Map Courtesy the American Heartworm Society

Click here for a more printer-friendly version of this article.  
Click here for a pdf version of this article.  



Contact us
8 am - 8 pm CST
7 days a week

7 am-10 pm, CST
7 days a week