Animal welfare is based on the principle that humans can use animals for food, research, and companionship, provided they are treated humanely. This framework focuses on minimizing suffering and maximizing the quality of an animal’s life through scientific assessment and legal regulation.
This technology renders the "necessity" argument obsolete. If you can eat a burger that is chemically identical to beef but requires no suffering, the only reason to slaughter a cow is sensory pleasure or tradition—reasons we don't accept for any other moral violation (e.g., dogfighting for entertainment). Animal welfare is based on the principle that