If your pet requires more advanced care than Dr. Thomas can be provide at Mono Veterinary Clinic, she is more than happy to refer you to one of the many specialists in the area. We are blessed by being in close proximity to the Veterinary Emergency Clinic in Toronto, the Mississauga-Oakville Emergency Veterinary Hospital (, and the Ontario Veterinary Hospital. There are board certified ophthalmologists in Midland, Stouffville, London and Toronto.

If you are looking for more information about your pet’s condition online, we highly recommend This is the website associated with an exclusive website for veterinarians called VIN that is run out of Davis, California. Dr. Thomas subscribes to VIN and uses it to help her formulate treatment plans for difficult cases.

Our Clinic

Mono Veterinary Clinic Professional Corporation opened its doors in March of 1989 as the third small animal clinic in the immediate Orangeville area. Since its inception, the clinic has operated as a solo practice, run by Dr. Gudrun Thomas aka Goodie.

Location Hours
Monday8:30am – 7:00pm
Tuesday8:30am – 5:00pm
Wednesday8:30am – 6:00pm
Thursday8:30am – 5:00pm
Friday8:30am – 7:00pm

Emergency Process When the office is closed veterinary services are provided by Emergency Veterinary Clinic Hwy 10 in Brampton. This clinic is located on the southeast corner of Wexford and Hwy 10, one light south of Fishermans Drive. The number there is 905-495-9907. They are open from 7 pm to 8 am Mondays, Tuesdays, Wednesdays and Thursdays, and then from Friday nights at 7 pm straight through until Monday 8am. They are also open on stat holidays. If your pet is hospitalized overnight and needs to come back to us, please note that their pickup time is between 7 and 7:30a. We are normally not open until 8:30a. If you would leave a message on our office phone 519-941-6383 we will do our very best to meet you at the clinic well before 8:30a.