Beige Cat with Beautiful Green Eyes

Cat Deworming

Internal parasites can negatively affect your cat’s health. They are easy to diagnose and treat with the proper diagnostic tests. Preventative deworming is recommended for all cats on a yearly basis.

What are some types of parasites found in cats?

Many different types of parasites can be found in cats, but some of the more common ones are tapeworm, roundworm and hookworm.

If my cat has worms, what symptoms should I look for?

Symptoms of internal parasites in cats can include unthrifty coat, weight loss, loose bowel movements and parasites in feces.

Are worms dangerous to humans?

Some internal parasite, such as roundworm can be transmitted to humans. Generally, young children or elderly people are more susceptible. Always take caution when handling feces or cleaning litter. Precautions can include wearing gloves or mask and always washing your hands after any contact with feces.

What is the deworming schedule?

Deworming for kittens or cats with active parasite infections may include multiple doses of dewormer several weeks apart. For indoor cats, a yearly dose of dewormer is recommended. If your cat travels outside for any period of time or is known to hunt small animals like mice or birds, deworming is recommended up to 4 times a year (every 3 months).

Are there any side effects from deworming medication?

Generally, no side effects are observed after deworming is administered. However, gastrointestinal upset may occur. If vomiting or diarrhea are observed, please contact our medical staff for further instruction.


Holiday Hours for 2021

Please keep in mind our holiday hours for 2021.

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Last updated: August 30, 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 - 6:00 pm
Saturday & Sunday: Closed

Sydenham River Veterinary Office:
Monday, Thursday, Friday: 9:00 am – 5:00 pm
Tuesday, 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