I've been having problems searching for two very specific very old animated movies. I've been searching for both for a long LONG time and have yet to figure out what the hell they are. They are both cartoons with anthropomorphic animals as the characters. Here is what I can remember of them:

Movie #1: David Copperfield
This movie is about a young male cat who I believe ends up becoming adopted by the antagonist - an evil man who forces children to work in his cheese factory - and goes on through his escape from the horrid place. I remember there being people forced to live under the warehouse because they have become 'infected' by an experimental purple cheese that now covers their body and could not be removed. The protagonist's best friend in the workhouse was a white dog with brown ears and a brown spot over one eye. There are two musical numbers that I remember explicitly titled 'I Hate Boys', sung by the protagonist's Aunt I believe, and 'Welcome to My Warehouse'.
Prize claimed by Roureem


Movie #2: Rock And Rule
This movie I remember much less about. It's set in a very futuristic world. I recall an evil scheme to unleash some kind of monster from an otherworldly dimension using a woman to sing very specific notes in a certain order. I can recall her being forces to put on a concert while her arms and legs are either bound to two columns or a giant ring with a collar that glowed when she was forced to sing. By the end of the movie, the woman and the protagonist both sing together a different selection of notes to seal the monster back. As far as musical numbers go, I cannot remember any of them per se, but I do recall briefly that three main character (including the protagonist) were brainwashed or hypnotized into not caring while the protagonist's love interest (the singing woman from before) was being kidnapped. Specifically, I recall them singing 'Daydream Believer' before the lot of them or shocked/power goes out and they suddenly remember what the hell is going on, spurring them into action.
Prize claimed by American Otter

This is where you come in. Remember that reward mentioned in the title? I'm offering a full body commission to the first person to correctly identify either movies for me. If you give me both the titles in the same message, then you've earned yourself two full body commissions. Happy hunting!

UPDATE: Thank you SO much for the quick responses! Roureem and American Otter, please send me references of your characters so I can give you the promised rewards. :)