They love to ride horses, they in order to groom horses, thus love to discover about horses.
Look for a fellow author who can act as a sounding board for your work-in-progress! The day after my granddaughter, Leah, was born, I wrote my first children's book, I Held You when You Were Born. http://Pr.lgubiz.net/bbs/board.php?bo_table=free&wr_id=511096