Our Doctors - Green Lane Animal Hospital- Thornhill, ON

Green Lane Animal Hospital

392 John Street
Thornhill, ON L3T 5W6




Dr. Tara Sermer

Dr. Tara Sermer

Tara Sermer has an undergraduate degree from Concordia University in Montreal, followed by her Doctor of Veterinary Medicine at the Ontario Veterinary College in 1994. She has a special interest in dental surgery but enjoys all aspects of general practice. Dr. Sermer spends time with her three Boston terriers, a Doberman, a cat and a few creatures of the two legged variety.


Green Lane Animal Hospital - Thornhill, ON - Michael Cooper DVM

Dr. Michael Cooper

Dr. Mike Cooper earned his undergraduate degree in Commerce from McGill University in 2009, before his love of animals pulled him towards veterinary medicine.  He completed his pre-clinical veterinary work at Ross University on the Caribbean Island of St. Kitts and his clinical year at Cornell University in Ithaca, New York. He moved back to his hometown of Thornhill and began applying his hard-earned knowledge at Green Lane Animal Hospital in 2016. Dr. Cooper has a special interest in dermatology and internal medicine, inspired by the tough cases he saw in St. Kitts and his desire to extend the quality and longevity of the life of all pets! He enjoys an active lifestyle including hiking and canoeing, while spending time with his two rescue-pups, Penny and Nash and his orange tabby, Benji.


Dr. Sean Herzog

Dr. Sean Herzog graduated from the University of Sydney in 2009. He worked in semi-rural Sydney for 3 years before returning back to his home town of Thornhill. He enjoys general practice, but really enjoys doing cytology and feline medicine. He spends his spare time destroying his 3 sons at video games, cleaning dirty diapers and going camping with his family and friends. He has a Cairn terrier named Tucker, who still enjoys walks and stealing shoes. 


Dr. Josh Seidman

Dr. Josh Seidman has joined the Green Lane Animal Hospital as of June 2021! Dr. Seidman is a graduate of Ross University School of Veterinary Medicine. He brings a fresh enthusiasm for all aspects of veterinary medicine! Dr. Seidman has four fur babies, including his dogs Rosie and Summer and his cats, Milo and Lola! Welcome Dr. Seidman!