Horses can help your gut health? Yes! In fact, studies show spending time with animals accompanied with exercise releases a drug called serotonin. What is serotonin? It’s a hormone that regulates mood and stress levels. Because serotonin is produced in the gut, it is believed that animals are a contributing factor to the overall health of your digestive tract. This makes Equine- Assisted Learning have a large impact on the wellbeing of patients with digestive issues or celiac disease.