Dr. MacKay is a 2nd generation veterinarian. He, like his father, graduated from the Ontario Veterinary College. During his undergraduate years, Clayton was Vice President of the University of Guelph Student Union and President of the OTS fraternity.
He entered private practice and became a partner in MacKay Animal Clinic. By 1989, the practice had become a 6 doctor, 35 employee, AAHA accredited general and specialty facility offering referral care in surgery, internal medicine, dentistry, behaviour and dermatology.
In 1993 Dr. MacKay returned to the Veterinary Teaching Hospital at the Ontario Veterinary College as their Director. This facility was supported by 50 clinical and teaching faculty and 125 employees.
In January 1997, Dr. MacKay became the Director of Veterinary Affairs at Hill’s Pet Nutrition Canada, Inc., and remained in that role until January 2010. Here he was responsible for the Hill’s Canada relationships with every veterinary and pet related organization in that country, as well as several international assignments for the global Hill’s business.
An abbreviated list of his involvement in organized veterinary medicine include: Board positions including Presidency of the College of Veterinarians of Ontario (1980), Board positions including Presidency of the Ontario Veterinary Medical Association (1986), Board positions including becoming the first Canadian President of the American Animal Hospital Association (1995-6), Board Positions including Presidency of the Society for Veterinary Medical Ethics (2008-9), Board Position including Presidency of the Toronto Academy of Veterinary Medicine (2006), Committee member and Chair of the AVMA animal welfare committee (1988-93).
During his practice career, Clayton consulted for the pharmaceutical and biological industry (Norden, Smith Kline and Pfizer), Pet Identification (Infopet) and Pet Insurance industries. He was a founding director of the Canadian Human Animal Bond Association and of Pet Trust at the University of Guelph. He also served as the veterinary advisor to the Pickering, Ajax and Whitby Animal Control for 15 years.
From 1974 to 1998, Dr. MacKay was involved in a large number of public relations efforts on behalf of veterinarians including newspaper columns, appearances on all major Canadian TV networks and served as the Canadian Broadcasting Corporations veterinary expert on Radio Noon in Toronto from 1986 to 1998.
Dr. MacKay currently is an adjunct faculty member of the Department of Companion Animals, Atlantic Veterinary College, Chair of the World Small Animal Associations’ Nutritional Guidelines Committee, Vet Partners Ethics Task Force member, AAHAs’ Task Force on Animal Welfare and their Leadership Identification Committee.
In his current role as a consultant to the veterinary industry and private companion animal practice, he maintains membership in many veterinary professional organizations (AAHA, AVMA, CVO, OVMA, SVME, TAVM, Vet Partners, and WSAVA).
His career has been recognized with several awards including twice being honoured as Veterinary of the Year (Ontario VMA in 1990 and Massachusetts SPCA and American Humane Education Society 1995), the Leadership Award from the Canadian Animal Health Institute (2009), the Industry Award by the Canadian VMA (2007) and lifetime honorary membership from the Ontario Veterinary Medical Association (2010) and Toronto Academy (2011).