Although I've always liked Cats Don't Dance as an entertaining film, it wasn't until I'd done a bit of research that I came upon the idea that really, many of the trials the animal main characters go through are just the sorts of things that minorities went through in the early days of Hollywood. So in a way, the animals are stand-ins for groups of people who traditionally had a hard time in show business. There's also the fact that all the human characters (as far as I can tell, anyway) appear to be white; but the animals are colors no human is, and so could be any race! -2writeis2life
At the end it shows Darla working as a janitor, still as a child. Lax child labor laws, or is Darla Really 700 Years Old?