I actually have to defend this movie. I really love it. The plot has similarities to The Aristocats, but only the very basic idea that a fortune is left to some animals and greedy humans plot to take it for themselves. The story of Millionaire Dogs is far different from the Aristocats' adventures.
I think the movie is overall quite cute and fun for most age groups. Parts of it are strange, but that might be partly because it was originally German, and also just because it's different from most movies. Yet I still was able to compare it with most other 'talking dog' movies that I know (since they happen to be my favorites), as well as other films.
Miss Lilly has adopted homeless dogs and, when she passes away, her estate is willed to them. She maintains her contact with two lead dogs, J.D. and his love interest Bella, letting them know in the end that their choice to turn her house into a home for all abandoned animals is just what she had wanted. Her niece and nephew, Hannie and Ronnie, are extremely ugly, but this works because not only is it funny, but they are supposed to be unattractive snobs who want their aunt's home to themselves (well, really each one wants it mostly for his/herself) & don't care a thing for Lilly. They're twins, and do a lot of finishing each other's sentences.
All of the dogs are likable characters. They don't look or move just like real dogs because they're not intended to. Chuffie is a sophisticated astronomer/astrologer purple terrier mix who was dumped from a limousine. Sherman is a Mastiff-type guard dog. J.D. is a Labrador mix (though he just looks more like a
generic terrierish roughish mutt.) Velvet is a completely adorable teenybopper toy (small dog of the general Yorkie/Lhasa-ish type.) And the very beautiful Bella, who falls for a Labrador for the second time in her life, is clearly a sighthound (specifically Saluki)--thus her thinness. (She reminds me of Sasha LaFleur & similar dogs too, which is a very good thing.) It's a highly exaggerated, yes, but then so is almost everything in the movie (and JD's pretty skinny himself.) The animation is very appealing--but all of it is still recognizable.
Millionaire Dogs isn't quite on the level of other animated talking animal movies (purely thanks to the awkward/inconsistent/error-laden animation), but it certainly isn't bad. What I DO think, is that it gets a low grade in the Animation department. Characters, story, overall design--A+. It's just that if Disney or Don Bluth or someone had made it, I believe the animation would look 100x better in almost every scene.