April 18, 2015

99 Henderson Avenue
Thornhill, Ontario
L3T 2K9

Ph: 905 881 2752

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Our Veterinarians

Dr. Gary Landsberg


Dr. Gary Landsberg graduated from the Ontario Veterinary College in 1976 and established the Doncaster Animal Clinic in 1976.  Dr. Landsberg offers behavior consultation services for owners of pets with behavior problems.  He is a diplomate and a past president of the American College of Veterinary Behaviorists (ACVB) and is also a diplomate of the European College of Animal Welfare and Behavioural Medicine and is presently on their executive board.  He is a frequent speaker at veterinary conferences around the world, and is a prolific author of research articles, behavior texts and book chapters.   He is co-author of Behavior Problems of the Dog and Cat from Saunders (3rd edition, 2013), a book and CD of behaviour client handouts for pet owners from Lifelearn (which can be downloaded by our clients from the behaviour articles on our website), the behaviour chapters in the Merck Veterinary Manual (together with Dr. Denenberg), and author of a chapter, Growing Old with Grace in the new book Decoding your Dog written entirely by ACVB diplomates.  Dr. Landsberg has also hosted his own TV show, Free for the Asking on the Life Network, and a pet show on CFRB and continues to appear regularly in the media.  Dr. Landsberg is a behaviour consultant for veterinarians on the Veterinary Information Network (VIN) and Director of Veterinary Affairs and Product Development at CanCog technologies.  In the year 2000, Dr. Landsberg received the companion animal behaviour award from the American Animal Hospital Association and in 2014, the meritorious service award from the Western Veterinary Conference.     


Dr. Sagi Denenberg



Dr. Sagi Denenberg is a 2003 graduate with Excellence in Academic Achievement from the Kosice Veterinary College in Slovakia. He relocated from Israel to Canada in 2003 and passed the North American veterinary licensing examination. 

Dr. Denenberg is providing behaviour consults for owners with their pets including dogs, cats, parrots and other exotic mammals. Dr. Denenberg is a diplomate of the American College of Veterinary Behaviorists, the European College of Animal Welfare and Behavioural Medicine and has passed his members certificate with the Australia College of Veterinary Scientists (Veterinary Behaviour). Dr. Denenberg has done a number of behavioural studies including the effects of pheromones on learning and socialization in puppies and a study of play toy preference in cats for which he was awarded the American Veterinary Society of Animal Behavior student award. He also authored a number of articles and book chapters including co-authoring with Dr. Landsberg the behaviour chapters in the Merck Veterinary Manual.   Dr. Denenberg is a consultant on the Veterinary Information Network (VIN). 

Dr. Denenberg is fluent in English and Hebrew, and has two dogs, a Golden Retriever named Shemesh and a Plott Hound named Hugo (from a shelter in Medicine Hat) as well as two senior cats, Elan and Lilly.