I'll bet you didn't know Sweetie is an American Girl STAR! She was featured in their magazine in the July-August issue of 1996. Later the article was printed in a book called American Girls and their Horses. This book is in its third printing and you can purchase it on Amazon or at the American Girls Store! Sweetie and I just had to swing by this store in Minneapolis to show our tribute.
Here's a link to the story in the book, American Girls and Their Horses. Sweetie's story is called "Wild Ponies" and it begins on page 16.