It sounds like an excellent case for legislation to outright ban the use of human-safe antibiotics on animals.

Working antibiotics are among humanity's most precious and most limited natural resources. In a century they'll be gone, with devastating impact on routine medical care. We're living in the one glorious sliver of humanity's history that we have access to antibiotics, and we're squandering them to make meat a few cents/pound cheaper. It's criminally irresponsible toward future generations.