About Heartworms

They’re more than a pest.

Heartworms (Dirofilaria immitis) are one of the most dangerous parasites for dogs. These long, thin worms attack the arteries of the lungs and the heart, causing blockages and other, sometimes fatal, medical issues.

How dogs get heartworms.

Believe it or not, heartworm disease is transmitted by mosquitoes. Just one bite is enough to cause a life-threatening infection.

Difficult for pet owners to detect.

Dogs can go months with heartworm disease before showing signs of infection. By the time signs appear, permanent damage may have already occurred.

Dogs with extreme infections may exhibit:

  • Mild, persistent cough
  • Reluctance to move or exercise
  • Fatigue
  • Reduced appetite and/or weight loss

Better to prevent than to treat.

Treating a dog for heartworms is a long, painful and costly process that involves a series of injections and often a period of isolation from the family. The best way to avoid this is to give a heartworm preventive like PetTrust™ Plus (ivermectin/pyrantel) once a month, year-round.

IMPORTANT INFORMATION: Dogs should be tested for heartworms prior to use. In a small percentage of treated dogs, digestive and neurological side effects may occur. Please see full product insert for more information.

¹American Heartworm Society