On 18 July 1950, Sang and several colleagues wrote a letter to C.H Waddington, outlining their concerns about perceived bias or favouritism in matters of staff promotions and various administrative malpractices within the genetics section of the Animal Breeding and Genetics Research Organisation. W.K Slater, secretary of the Agricultural Research Council (ARC), met with those concerned, after which he requested Sang and his colleagues to apologise to Waddington for their lack of faith in his direction and to tear up the letter which they had written. Sang agreed to this. However, by September he had written to W.G Alexander of the ARC complaining of the 'malpractices, maladministration and misuse of public property which has occurred in the Genetics Laboratory' and requesting that an 'official, and quasi-judicial enquiry' be carried out. He subsequently composed a memorandum, dated 14 September 1950, addressed to the ARC detailing the entire situation and again requesting a judicial enquiry. The resulting ARC enquiry 'into certain administrative matters connected with the Genetics Laboratory', took place in St Andrew's House, Edinburgh, from 11-13 October 1950 and was chaired by Slater. The outcome of the enquiry was that the Genetics Laboratory was 'reorganised', with Sang moving to a laboratory within the Poultry Research Centre under the directorship of Alan Greenwood. Waddington ceased to be employed by the ARC but instead became a full-time employee of the University, maintaining a dual position as Buchanan Professor and director of the Department of Animal Genetics.