Small white dog sleeping on side

Heartworm Testing for Dogs

Heartworm is a potentially fatal parasite that your pet can get from being bitten by mosquitos. Once infected, heartworm makes their way into the blood vessels in your pet’s heart and lungs. Left untreated, a heartworm can cause permanent damage to your pet’s blood vessels and can be potentially fatal, leading to multiple organ failure. For this reason, early detection is key. This can only be done through an in-hospital examination.

What are the symptoms of heartworm?

During the early days of infection, heartworm is completely undetectable by the human eye. Your pet will most likely not display any sort of changes in their behaviour. Once the condition becomes more severe and progressed, that is the main point at which symptoms will begin to appear. These signs include: exercise intolerance, lethargy, coughing, and difficulties breathing.

What are the treatment options for heartworm?

The best course of action against heartworm is prevention. If your pet is taking their regular parasite prevention medications, they will have sufficient protection from heartworm. Once infected, treatment is both expensive and complex. Heartworms have to be removed from your pet’s chest manually and then through injections to kill the adult heartworms. We encourage you to call us and schedule an appointment to ensure that your pet is properly protected with medications against heartworm and other parasites.

Can I get rid of heartworm without going to the veterinary clinic?

As you may know, a quick search on the internet will lead you to several at-home remedies for getting rid of these parasites. That being said, it really is best to leave treatment to your veterinarian, especially due to the dangerous long-term effects of heartworm disease. You can save time and money by consulting with our team, instead of trying potentially unsafe DIY methods.

Last updated: April 5, 2021

Dear Clients,

With recent changes to restrictions on businesses, we are pleased to advise that effective May 25, 2020 the restrictions on veterinary practices have been lifted. Based on these changes, below are some important updates to our operating policies.

1. WE CAN NOW SEE ALL CASES BY APPOINTMENT ONLY This includes vaccines, wellness exams, blood work, spays and neuters, dental services, and more!


  • Continue our "closed waiting room" policy to protect our clients and staff. When you arrive, please remain outside the hospital and use your cell phone to call us. We will take a history of your pet's health and discuss any concerns. A staff member will then meet you outside to bring your pet into the hospital for an examination. The Veterinarian will call you to discuss the recommended treatment plan. After your appointment, a staff member will return your pet to you outside, and take care of any needed medications and payment.
  • Continue the use of credit cards as the preferred payment method.
  • Continue with curbside pickup of food and medication (unless you have used our online store and are having your order delivered directly to your home). To place an order through our online store, visit our website and click on "Online Store".
  • 3. ONLINE CONSULTATIONS ARE AVAILABLE If you wish to connect with a veterinarian via message, phone or video, visit our website and follow the "Online Consultation" link.

    4. OPERATING HOURS We are OPEN with the following hours:
    Monday to Friday: 7:30 am - 5:00 pm
    Saturday: 8:00 am - 12:00 pm (Pick-up Only)
    Saturday - Sunday: Closed

    5. NEW PET OWNERS Have you welcomed a new furry family member to your home? We’d love to meet them! Visit our Must Know New Pet Owner Information page for useful resources and helpful recommendations for new pet owners.

    Thank you for your patience and understanding and we look forward to seeing you and your furry family members again!

    - The team at Dundas Veterinary Services