Associate Veterinarians

Dr. Matthew Kornya

Dr. Matthew Kornya, DVM, Resident ABVP (feline)

Dr. Matthew Kornya is currently enrolled in Canada's first ABVP Feline Residency Program, working to attain board certification. He is originally from Welland, Ontario, and completed his undergraduate degree in Bio-Medical Science at the University of Guelph before graduating from the Doctor of Veterinary Medicine Program with the Andrew Smith Medal (the highest honour awarded to a graduating veterinarian). He has had a lifelong love for cats and feline medicine with special interests in emergency medicine, oncology and pathology. Dr. Kornya has spoken at several international conferences on various subjects, with a special focus on Feline Retroviruses. In his spare time he enjoys reef aquarium keeping. He lives with his 5 cats and his cockatiel.


Dr. Diane Bourdeau, DVM

Dr. Diane Bourdeau DVM graduated from the Ontario Veterinary College in 1988. She was the owner of a small animal practice in Cambridge for 10 years before she decided to pursue her life-long ambition of feline practice. When not working, Dr. Bourdeau is busy at home with her family and her four cats Calvin, Tony, Cosmo and Josie.


Dr. Tom Jackson, DVM

Born and raised in Hamilton, Dr Tom Jackson, DVM graduated from the Ontario Veterinary College in 2000 and joined The Cat Clinic as a clinician in February 2008. Tom is also an adjunct professor in the Bachelor of Health Science program at McMaster University and volunteers his time to "Podmed", a weekly review of the medical research headlines produced by Johns Hopkins University. When he's not busy practicing medicine or teaching he enjoys paddling his canoe, jazz music and hockey.

Dr. Jean Clark

Dr. Jean Clark, DVM

Dr. Jean Clark DVM graduated from the Ontario Veterinary College in 1995. She was the owner of the Cat Hospital of Mississauga before joining our team. There are two cats Charlie and Gracie in permanent residence at Dr.Cark's busy home. At times they grudgingly make room for her son's two cats and his big old bull dog.

Dr Sandra Chernesky

Dr. Sandra Chernesky, DVM

Inspired by the famous Chicago Feline Practitioner, Dr. Barbara Stein, Dr. Sandra Chernesky, DVM pioneered the first "Feline Only" practice in Hamilton, and the second in Canada. She continues to enjoy the ever-changing face of feline medicine as an associate veterinarian at The Cat Clinic. An avid gardener, Dr. Chernesky is known to liven up the Clinic with flowers from her home; she also enjoys riding her horse Peggy and taking Molly, her standard poodle out for a walk.

Dr. Shari Muller

Dr. Shari Muller, DVM

Dr. Shari Muller, DVM graduated with honours from the Ontario Veterinary College at the University of Guelph in 2009. After graduation, Dr. Muller worked at a mixed animal practice for 3 years before deciding that her passion was working only with the feline variety. While Dr. Muller sees most clients at our associate clinic, Village Cat Hospital in Ancaster she is still available for appointments on some weekends at The Cat Clinic Hamilton. Her family includes four cats Be-Be, Te-Te, Kashima and Bentley. When she is not working, Dr. Muller enjoys hiking, travelling and spending time with her family.