The goal of this clinical trial is to learn about occupational therapy integrating horses for autistic youth. The main questions it aims to answer are:

* Does occupational therapy integrating horses improve self-regulation in autistic youth * Does occupational therapy integrating horses affect salivary cortisol and alpha-amylase

Participants will receive 10 weeks of occupational therapy, and will be asked to provide saliva samples each week.

Researchers will compare occupational therapy integrating horses to occupational therapy in a clinic to see if integrating horses affects self-regulation.