A hundred horses
by Sarah Lean

Eleven-year-old Nell must spend spring break in the country with an aunt and cousins she has never met, but while there she meets a mysterious, wild girl with a strange connection to horses and an uncanny understanding of Nell.
HorsesFamiliesRunaway childrenFamily lifeFictionRunawaysConduct of lifeFarm lifeJuvenile fictionChildren's fictionRunaways, fictionHorses, fiction