When Rupert Isaacson’s autistic son was three years old, he was non-verbal. It was feared he would never be able to communicate effectively.
However, young Rowan’s life drastically changed when he hopped on the back of his neighbour’s horse, Betsy, and slowly began to speak.
More and source: https://www.independent.ie/irish-news/my-non-verbal-autistic-son-began-to-speak-after-hopping-on-our-neighbours-horse-now-he-is-20-years-old-and-completely-independent-41914268.html