Today's choice is a sweet (and short) story for the younger reader, Helen Kay's A Pony for the Winter.
You can read more about Helen Kay here.
Read more about the pony book in Heroines on Horseback, my survey of the world of the pony book from the 1930s onwards. You can buy a signed copy from me (I'll post them worldwide). The book's also available from the usual sources, or your local bookshop.