In 1959 the Ontario the College of Physicians and Surgeons published a report on “Osteopathy and Chiropractic” outlining a powerful offensive policy to give chiropractic in Ontario a knock back. This triggered several Royal Commissions throughout the 1960’s looking at the state of health care in Canada and chiropractic care in particular. Source

In 1955 the regulations were again changed by the government and the Board of Directors of Chiropractic was advised that it no longer had control over unethical advertising. This presented serious problems, not only for the Board, but also for the Ontario Chiropractic Association. Many in responsible positions in the profession wondered why enabling legislation was being thwarted, by whom, and if these continuing events were deliberate. This removal of control over advertising from a piece of so-called “regulatory legislation”, was the direct result of government action, and it was continued for an entire decade before the Department of Health…

In 1937, upon the recommendation of the Honourable the Attorney-General, new regulations were passed which “further emphasized the requirement ‘by diagnosis’ for chiropractors by inserting the words ‘(including all diagnostic methods)’”. According to the College of Physicians and Surgeons this was an amendment: … that was vicious from the standpoint of the College and certainly contrary to the intention of the Legislature that those under The Drugless Practitioners Act were to be limited to ‘treatment’ in the ordinary meaning of the term as something quite apart from diagnosis. These expanded definitions have been troublesome to the College ever since, making…

In 1925 the Ontario College of Physicians and Surgeons in an effort to limit the chiropractors’ role in health care, requested the government enact legislation to regulate the health practitioners out of their jurisdiction. As a result the “Drugless Practitioners Act” of 1925 was enacted to regulate chiropractors, optometrists and other new professions. Chiropractic was now legal but strictly limited.

In 1915, the Ontario government issued a report, the Hodgins Commission, an investigation into the state of medical education in Ontario. This report noted “new avenues of healing which had not previously been dreamed of,” including “bone setting”, “manipulation” and “mechanotherapy”. This commission reacted as expected and recommended that Ontario’s three chiropractic colleges be shut down. The commission did recognize the value in these methods and recommended they be added to the medical curriculum.