Dog Heartworm Test

Heartworm is a preventable but serious and potentially fatal parasite that primarily infects dogs, cats, and a variety of wild animals. Heartworms can only be transmitted from animal to animal by mosquitoes. The tiny larvae enter the pet’s bloodstream and migrate through to parts of the body where they start to grow into larger worms.

If a dog has heartworms, what symptoms should I look for?

In earlier stages, you may not even know your dog has been infected with heartworms as they are very, very small. As they grow, you may start to notice a mild, persistent cough, tiredness and a reluctance to exercise. Later stages include a more developed cough, trouble breathing, and even coughing up blood. If left untreated heartworm disease can be fatal.

How does a dog get heartworms?

Heartworms can only be transmitted from infected animal to animal by mosquitoes.

What are the treatment options for heartworms?

Routine heartworm testing is number one when it comes to prevention and treatment. It is essential to make sure your dog has not been infected with heartworm before going on any preventives. We have a variety of options for our patients depending on their needs. Usually, the preventatives are all given monthly from June-November. Many of them also prevent and treat intestinal parasites and fleas.

Why is recovery for heartworm treatment so challenging?

Without routine heartworm testing or prevention we won’t know if your pet is infected until symptoms appear. It can be costly to treat the adult form of heartworm, not to mention risky for the patient. Unfortunately, even with treatment, it will not be able to undo any damage created to the heart and lungs from the adult heartworm.


Lisa Clifford holding two dogs

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Last updated: December 11, 2020

Dear Clients,

As Ontario continues its reopening, we are excited to see our community get closer to a sense of normalcy. We applaud the significant effort and sacrifices you and your family have made to help us get this far.


At Manitou Animal Hospital our primary goal is to care for your beloved pets. By extension, this means keeping you as a pet parent healthy as well. Many of you have already recently visited the hospital and have personally experienced the additional safety procedures we have put in place to ensure the well-being of you and your pets using our “closed waiting room” policy.

Our "closed waiting room" policy:

  1. When you arrive in the parking lot, please remain outside the hospital and use your cell phone to call 519-893-1360. We will take a history of your pet's health and discuss any concerns.
  2. A staff member will then meet you outside to bring your pet into the hospital for an examination.
    We ask that you remain in the parking lot and keep your phone turned on.
  3. The Veterinarian will call you once the physical exam is complete to discuss the recommended treatment plan.
  4. We encourage credit card over the phone as the preferred payment method. We can also accept e-transfer.
  5. A staff member will bring your pet and any medications back outside to you.

During the coming months and as long as COVID-19 continues to circulate in our community we at Manitou will continue to offer our services using these enhanced safety procedures, including the curbside and closed waiting room service model. For the health and safety of everyone, we will not be able to have you accompany your pet(s) into the clinic for procedures at this time. We unfortunately would just not be able to meet proper physical distancing requirements and ensure your safety and our team's.

We typically have a significant number of clients [100+] visit our clinic daily whether it be for medication, food or for a visit with the veterinarian or vet technician. Space in the front room and the exam rooms is very small, a well documented factor for increased risk of COVID transmission. If everyone were to come inside our clinic, even with masks on, it would significantly increase the risk of COVID exposure to each client entering the clinic as well as our staff. We are simply not willing to risk the health of you, your family and our staff. We know that with continued effort we will get through this together. We sincerely appreciate your patience and help in working with us during these challenging times.

Until then, we promise to give each and every one of your pets the very best care and a ton of hugs and kisses when they are in for a visit. We always treat them as if they were one of our own and look forward to seeing them!


Your dedicated care team at Manitou Animal Hospital


We are OPEN with the following hours:

Monday to Thursday: 8:00 am - 7:00 pm
Friday: 8:00am - 6:00pm
Saturday: 8:00 am - 12:00 pm (food and medication pickup only)
Sunday: CLOSED