I believe breed-specific legislation will count, as so many pitties get put to sleep without being given a chance by shelter systems and it does not just target pitties but some places target other breeds as well.

If you want to go for sheer gut-wrenching horror, that's always puppy mills, but depending on how big the contest is, a lot of people may choose that topic, so you'd have to do a superlative job to stand out.