Trigger wasn't just a companion; she served as a sort of "calming influence" on Seabiscuit, who was known for being a hot-tempered horse. They were often seen grazing together in the paddock, and Trigger's gentle presence was believed to help keep Seabiscuit relaxed and focused.
While Trigger wasn't a racing horse herself, she was a constant presence in Seabiscuit's life and played a significant role in his success.