This fine story of a lonely girl illustrates the power pets have in giving us an outlet for feelings and helping come to terms with life problems. Hiromi lives with her tutor and house-keeper, becuase her parents have no time for her or each other. On one level this works as a commentary on Japanese, and other societies', obsession with material and career success rather than human relationships.
The script seems to have real respect for all the characters -- the viewer comes to care about even the supporting cast. The final message has a lot do with being honest, with yourself and those you care about, in facing up to your feelings. If the ending is a bit too pat, it's forgiveable in a children's fantasy, but it's unfortunate that every child cannot stop their parents divorce merely by asking. But this is a quibble in a sinecrely enchanting movie.
Junkers the schnauzer may or may not talk and magically grant wishes -- whether he really does so, or it happens only in the heroine's imagination, is really irrelevant. But Junkers the movie surely has some magic for the viewer.