Like many of the other animals that have had long exposure to Veralidaine Sarrasri, Cavall's Heart gained greater intelligence over the years. She was likely bred and raised at Fief Cavall, as Lord Wyldon breeds horses and dogs.
She helped the other horses of the pages' stables stop a fight that had broken out among the pages. She aided them by dragging Garvey of Runnerspring from the fray. Other horses, like Shadow, had a similar approach, while Zahir's bay just waded through the crowd, forcing the pages from each other. Peachblossom was the one horse that had no compunction with injuring the pages, which the other horses tried to avoid.