VICH GL9 GCP is the principle source of guidance for veterinary Good Clinical Practice (GCP) studies; it is from here we take our lead. Quality assurance (QA) in veterinary clinical studies is the responsibility of all study personnel as defined in VICH GL9 GCP. In the guidance, however, the role of quality assurance staff in veterinary clinical studies is illdefined. This article by Iain McPhee BSc, MBA, FRQA of RQA gives additional guidance on QA audit