Deena Larsen

Dr Larson
24/7 Emergency Care
Dr Larson

Deena grew up on a hobby farm outside of Port Perry ON surrounded by a variety of animals. She graduated from Queen's University with a Bachelor of Science in Biology before completing her Bachelor of Veterinary Science degree from Massey University in New Zealand. Following that, Deena worked a short term position at a small animal general practice in Melbourne, Australia. She then qualified for a Small Animal Internship position at the Ontario Veterinary College and returned home to Canada. In 2014, Deena started working at the 404 VERH as an ER veterinarian and has enjoyed being a part of the 404 team ever since.

Deena lives in Uxbridge with her husband David, daughter Hazel, Husky mix Georgie and their cat Turbo. When not at the 404, Deena loves spending time with her family outdoors downhill skiing, cross country skiing, running, hiking and waterskiing.


BSc, Queen’s University, Kingston ON – (2007)
BVSc, Massey University, Palmerston North NZ – (2012)

Advanced Clinical Training

Small Animal Rotating Internship, Ontario Veterinary College Guelph ON – (2014)

Areas of Special Interest

Emergency and critical care

See our departments

24/7 Emergency Care

York Region 24/7 Veterinary Emergency and Referral Hospital

24/7/365 – no appointment required

At VCA Canada 404, we know that emergencies don’t always happen on weekends or after supper on a weeknight.  While your primary care veterinarian is always your first point of contact when such an emergency arises, we are here, available to see you and your pet 24 hours a day, 7 days a week, and 365 days a year, when you need us.  As one of the only 24/7 veterinary emergency & referral facilities in York Region, our emergency service takes no holidays!  

Supported by our own team of veterinary specialists

One of our emergency service’s most valuable assets is its association with our referral/specialty department. It is all one hospital, no fragmented ownership – all of us under one common banner with one common mission – to help the people and pets of York Region. Our emergency veterinarians work alongside our board-certified specialists and have access to the advanced diagnostic equipment that comes with them - ultrasound, digital radiography (x-rays), endoscopy (important in foreign body retrievals), and computed tomography (CT), just to name a few. Our digital radiography and CT images can be sent for interpretation by board-certified veterinary radiologists 24/7/365 with STAT interpretation available within 30min.

Advanced diagnostics such as CT, endoscopy, ultrasound, digital radiography all on-site

We are one of very few veterinary hospitals in North America, the only veterinary hospital in Canada in fact, to offer rapid, detailed imaging via a 64-slice CT (computed tomography) unit.   Our CT is available for use by both our emergency service around the clock, as well as our various specialty departments.  

Our 24/7 Emergency Care Team

404 Veterinary Emergency and Referral Hospital

510 Harry Walker Parkway South

Newmarket, ON L3Y 0B3

Main: 905-953-1933

Fax: 905-953-8845

Hospital Hours:

    Mon-Sun: Open 24 hours


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