 In May 1968, Hayhoe Bros. became Hayhoe Mills Ltd.

Don Hayhoe, another son of Harold's also joined the company in 1965 and together Harold and his two sons operated the business until 1985 when Harold Hayhoe retired.Harold Hayhoe, a true milling pioneer, died December 30, 1987.Don Hayhoe left the business in 1994 when John Harold Hayhoe, who had built the milling business into significant Ontario marketshare, bought him out.