Wish by Barbara O'Connor

She even has a list of all the ways there are to make the wish, such as cutting off the pointed end of a slice of pie and wishing on it as she takes the last bite. But when she is sent to the Blue Ridge Mountains of North Carolina to live with family she barely knows, it seems unlikely that her wish will ever come true. That is until she meets
Wishbone, a skinny stray dog who captures her heart, and Howard, a neighbor boy who proves surprising in lots of ways. Suddenly Charlie is in serious danger of discovering that what she thought she wanted may not be what she needs at all.