Our team continues to be here for you and your cherished pets. We are OPEN and are now able to provide a wide range of services. To learn more about the changes we have implemented in response to COVID-19 and what to expect during your next visit, click here.

|  After Hours Emergency Number: 705-671-3949

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Dog Heartworm Test

Heartworm is a parasite that causes very serious, potentially fatal, illness in dogs. It is an easily preventable condition, but a heartworm test must be done prior to putting a dog on heartworm prevention. The heartworm test is a simple blood test that can be done quickly during your dog’s visit.

What are the symptoms of heartworm disease in a dog?

In the early stages of heartworm disease, the dog may not have any symptoms or very mild symptoms. Heartworms usually live in the vessels surrounding the dog’s heart, so symptoms most commonly seen are those associated with heart disease. Coughing, exercise intolerance, tiredness, weight loss and decreased appetite are some of the most common symptoms. As the disease progresses, the symptoms become more pronounced and the dog becomes more ill.

How do dogs get heartworm?

The parasite is transmitted by mosquito. An infected dog is bitten by a mosquito who takes a blood meal from the dog. The larvae of the heartworm are in the blood and ingested by the mosquito. The mosquito bites another dog and the larvae are transmitted through the bite. It takes approximately 6 months for the larvae to develop into adult worms.

What are the treatment options for heartworms?

The best option for dealing with heartworm is PREVENTION! There are different prevention options so feel free to discuss which option would work best for your dog with any of our staff members. Prevention typically involves a once-a-month topical product or an oral tablet.

Why is recovery and heartworm treatment challenging?

Treating heartworm disease is challenging because it involves the dog’s cardiovascular system. Treatment requires killing the heartworm parasite and the worms live in some major blood vessels around the heart. Any sudden action could cause blockage to the blood vessels which could result in death for the dog. Treatment needs to be done in intensive care in the hospital with intravenous medications and continuous monitoring with completely restricted activity for the dog. That’s why prevention is ALWAYS the best!


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Last updated: June 29, 2020

Dear Clients,

With recent changes to restrictions on businesses, we are pleased to advise that effective May 19, 2020 the restrictions on veterinary practices have been lifted. Based on these changes, below are some important updates to our operating policies.


This includes vaccines, wellness exams, blood work, heartworm testing, spays and neuters, dental services, and more!



We are OPEN with the following hours:
Monday, Tuesday and Thursday: 8 am - 6 pm
Wednesday: 8 am - 7 pm
Friday: 8 am - 4 pm
Saturday & Sunday: Closed


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!

- Your dedicated team at Cambrian Animal Hospital