Why It Would Suck
In the Disney universe animals talk, which at first all looks like good fun. When you're feeling lonely or rejected by your fellow humans, you can always find an animal sidekick to provide conversation, keep you company or at least entertain you with their bumbling/farting antics. Crickets give you goal-setting advice and adorable fish become your best friends. And even animals that apparently can't talk can still help out with household tasks, like the birds that help make a dress in Cinderella.
Which makes it all the harder when it comes time to eat them.
Yes, with every animal around you potentially being a fully conscious, thinking being, any animal product or service used by humans would involve murder, harassment or in the very least slave labor.
Want to enjoy some seafood? Then you'd better be OK with listening to Sebastian, the crab from The Little Mermaid, crying in his pidgin English all the way down your throat. Merely milking a cow becomes sexual harassment.
Becoming a non-leather-wearing vegan doesn't help either, because in this universe, inanimate objects can also be enchanted humans in disguise. Want to throw a cup at your prince after he comes home from another long night of "saving princesses," the stink of "magic potion" wafting from his crotch? Now you've shattered Ms. Teapot's son, you killer. Oh well, maybe he'll make you feel better by building a romantic fire with that old tree he just cut...