The term ''coming of age'' in films is often associated with first love, first war, first kiss -- even first roll in the hay. For Willie Morris, it was his first dog. And when Morris did come of age, he wrote a memoir of his experience titled ''My Dog Skip,'' which has been adapted into a sweet, quiet film about growing up.
The story set during World War II revolves around young Willie (Frankie Muniz), a shy, book-reading loner in Yazoo, Miss. Eight years old, Willie is an only child with no… 
