Dan O’Neill explains the importance of big data in making evidence-based decisions in practice. He introduces the VetCompass database, which gathers data from first-opinion practice and uses it to develop peer-reviewed publications. This one-hour webinar was first broadcast as part of BSAVA’s Learn@Lunch series. Learn@Lunch broadcasts are available to BSAVA members only and are free to attend - visit the education page of the BSAVA website for details of future Learn@Lunch webinars. Recordings will be available for 3 years via the BSAVA Webinar Library.