Chatham-Kent Heartworm Disease Cases Are On The Rise

The vast majority of heartworm-positive cases in Canada happen right here in Southwestern Ontario. Heartworm disease is transmitted from dog to dog through mosquito bites. When a mosquito bites an infected dog, it takes in tiny heartworms, which it then transmits to the next dog it bites. Heartworms then mature in the dog’s bloodstream and collect in its heart and blood vessels.

Heartworm larvae can grow over 12 inches in length and can do immense damage to a dog’s heart and lungs. Heartworm is particularly dangerous for dogs because it takes several months for the symptoms to start showing. If the proper treatment is not administered, Heartworm disease can be fatal.

Indications your dog may have heartworm include fatigue, weight loss and coughing.

Ensuring Your Dog Is Protected
Preventing heartworm disease in your dog is simple. Just visit one of our Chatham-Kent clinics (Merritt Animal Hospital, Dresden Veterinary Clinic and Sydenham River Veterinary Office) to pick up preventative medication that will keep your dog safe during mosquito season. You can also have your dog tested for heartworm disease to ensure the condition is not already present.

Give us a call at 519.360.4508 to book your appointment.



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Chatham-Kent Heartworm Disease Cases Are On The Rise

The vast majority of heartworm-positive cases in Canada happen right here in Southwestern Ontario.

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Last updated: October 25, 2021

Dear Clients,

We are all aware of the concerns and rapidly changing situation with COVID-19. Due to the close public contact that our work requires, we have taken necessary measures to protect you and our team while providing care for your furry family members. As part of our due diligence, we have decided to consolidate our staff by maintaining all operations at Merritt Animal Hospital and Dresden Veterinary Clinic with a closed door policy and have our Sydenham River location open for medication/food pickup ONLY. 

The safety of our team members and clients is very important to us. As such, we will continue to follow all provincial health standards by having extensive cleaning protocols, wearing masks and gloves, and practicing physical distancing as much as possible within our teams.

Based on these changes, below are some important updates to our operating policies.



If you wish to connect with a veterinarian via message, phone or video, visit our website and follow the "Online Consultation" link.


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.


Merritt Animal Hospital:
Monday to Friday: 8:30 am - 5:30 pm
Saturday: 9:00 am - 5:00 pm
Sunday: 10:00 am - 2:00 pm

Dresden Veterinary Clinic:
Monday to Friday: 8:30 am - 5:30 pm
Saturday & Sunday: Closed

Sydenham River Veterinary Office:
Thursday - Friday: 9:00 am – 5:00 pm
Monday - Wednesday, Saturday & Sunday: Closed

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

- Your D.M.S Group Veterinary Team