In human and animal health, conventional approaches to preventing and controlling gastrointestinal disease (GI) have not reduced the overall disease burden. In order to understand and mitigate shared GI aetiologies between humans and animals it is necessary to develop One Health Surveillance approaches that integrate data-sources contributed to by human and veterinary healthcare. Here we describe how a real-time surveillance system for early detection of GI outbreaks in small animal and human health is being developed by collecting electronic health records from veterinary practitioners and a telephone-based 24-hour medical triage service in the UK.