My Friend Flicka (1943)

Ken McLaughlin struggles to please his family in any way. He comes back from boarding school boasting poor grades and facing going through the fifth grade again, much to his fathers dismay. Ken's mother, Nell, manages to persuade his father Rob to let him choose a colt from the herd for himself. He instead chooses a sorrel chestnut filly, who becomes injured soon after. Can Ken nurse the filly back to full health?