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
Dewormer Comparison Chart 
Heartworm Disease: Transmission and Prevention 
Dog Deworming Guidelines 
Dog & cats are both affected by heartworm disease
  • 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 2-3 years in cats.

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

  • Microfilariae are found in the blood of 80%-90% of dogs, while only 20% of cats have these in their blood.

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

  • The American Heartworm Society (AHS) estimates that only 55% of dogs in the U.S. are currently on a heartworm preventive, leaving 27 million dogs at risk of acquiring heartworm disease.

  • 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, sea lions, and humans.

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

  • Research suggests that heartworm disease could be virtually eradicated using available preventives.

  • 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
7 am-10 pm, CST
7 days a week
8 am - 8 pm CST
7 days a week