Animal interventions are becoming increasingly popular for the treatment of autism spectrum disorder symptomology (ASD). However, there is a lack of information regarding which animal and animal-specific factors provide the most advantageous therapeutic benefits to effectively address ASD symptoms. This study examined the observations, and values of practitioners who provide therapeutic interventions to individual with autism spectrum disorder (ASD) using farm animals. The purpose was to gather information regarding impressions of species-specific factors observed to be the most effective for treating ASD symptomology. It is hoped that the observations reported by providers might help determine focused recommendation to increase effectiveness of treatment, helping to fill the increasing knowledge we are accruing on animal assisted interventions and ASD. Results of this study give insight into specific animal species factors that contribute to ASD symptomology reduction.