Some kind of courage by Dan Gemeinhart
Publisher: New York: Scholastic Press 2016.; 240 p.
A children's story set in 1890, all that orphan Joseph Johnson has left is Sarah, a "half-wild Indian pony". She's been sold off without his say so and Joseph means to get her back. Along the way he encounters another child Ah-Kee. Though neither of them can understand the other, the two boys form a wordless bond as they both seek out the respective goals that have brought them so far from home.
Some kind of courage, is aimed at a younger audience than most westerns,
it contains two child protagonists and the supporting child protagonist Ah-Kee is Asian. Both child protagonists and ethnic protagonists can be classified as appeal terms.