Equine welfare is a topic that has attracted the attention of both the scientific community and the public. In the domestic environment, horses are often kept in suboptimal conditions that limit the expression of species-typical behaviors and compromise their welfare. Environmental enrichment strategies have been identified as an interesting option to make the domestic environment more interactive and complex, resulting in an improvement in the animal’s quality of life. Olfactory stimulation, a form of sensory environmental enrichment that aims to trigger the sense of smell through the introduction of odors, has shown promise for horses.