First a blood test is taken by your veterinarian to determine that your dog is not already infected. The preventative should be continued from early spring until the end of December in Connecticut. Or it may be taken year round. They are safe medications. Heartworm disease is very preventable but very difficult and dangerous to treat.
Prevention is the answer.
Reprinted courtesy Connecticut Veterinary Medical Association. Nothing can replace a complete history and physical examination performed by your veterinarian. Please let me know what you think of this site and what you would like to see on it. Return to top of page.