Obituary for Dr. Michael Colterjohn

It is with great regret that we announce the loss of Dr. Michael Duncan Colterjohn on March 28 after a determined battle with brain cancer.

Michael is predeceased by father Duncan and younger brother Nigel, and survived by Moira Gunn and their son Duncan, mother Libby, brother Richard, sister Shaenie, sister in laws Angela and Meighan,  and adored Nieces and nephews Ian,
Andrew, Brock, Tristan, Nicola, Ainslie, Rebecca, Colin, Connor and Annabel.

Michael was born in in Edinburgh, Scotland in 1956, and after living with his family in Malaysia, England  and Zambia, immigrated to Canada at the age of 11 to Lindsay,Ontario where his father Duncan accepted a position as a family physician.

Michael grew up surrounded by horses, fostering a passion for show jumping and fox hunting which inspired a career as one of canada’s top equine reproductive veterinarians. Michael joined Gardiner Farms in 1987, and his Presidentcy
developed the Gardiner Farm name into one of the most respected and successful thoroughbred breeders in the industry.   Following the deaths of George and Helen Gardiner, subsequently Michael and  Moira Gunn, and farm manager Sherry McLean built Paradox Farm Inc, into one of Canada’s top thoroughbred breeding stables.

Michael was also an extraordinary athlete, holding distance running records at Lakefield College School, finishing numerous marathons and triathlons, including Ironman USA in Lake Placid in 2001.

Michael will be fondly remembered by his many friends in the racing and Caledon communities as a  man driven by passion, integrity, and friendship.

We give special thanks to Dr. Whitton, Dr. Hirte, and Dr. Kis, for their expertise and compassionate care. In lieu of flowers, donations can be made in Michael’s memory to Juravinski Cancer Centre at

All visitors will be welcome at the Egan Funeral Home in Bolton, at 201 Queen Street South (905 -857-2213)  Visitation hours are Sunday April 1st  from  2-4pm, and Monday from 6-8 pm.  A service for friends and family will be held at the Egan Funeral Home Chapel on Tuesday April 3, at 4pm, with a reception to follow from 6-8pm  in the Northern Dancer Room at Woodbine Race Track.