Effects of feeding a high omega-3 fatty acids diet in dogs with naturally occurring osteoarthritis

Summary The aim of this randomized, placebo‐controlled and double‐blinded trial was to compare the effect of a veterinary therapeutic diet (VTD) rich in omega‐3 fatty acids (omega‐3) from fish origin to a regular diet used as control (CTR) over a period of 13 weeks in dogs afflicted by naturally occurring osteoarthritis (OA). Thirty privately owned dogs were selected. Dogs had lameness confirmed by an orthopaedic examination, had stifle/hip OA and had locomotor disability based on the peak of the vertically oriented ground reaction force (PVF) measured using a force platform. At Baseline, all owners were asked to determine 2–5 activities of daily living that were the most impaired. Activities were scores (0–4) in accordance with severity using case‐specific outcome measures (CSOM). The PVF was also measured. Dogs (15/group) were then randomly assigned to receive either the CTR or the VTD. The CSOM was completed twice weekly. The recording of PVF was repeated at Week 7 and 13. The VTD‐fed dogs showed a significantly higher PVF at Week 7 (p