It would be easy, if the agricultural industry was concerned about antibiotic resistance. Unfortunately, like most markets, externalities like that are hard to price in. If Farmer Bob takes the high road and stops using so many antibiotics, he'll lose some stock and get outcompeted by Farmer Bill. If the turkey farmers band together heroically and agree to reduce their use of antibiotics, uninformed consumers will choose chicken instead. And there's not enough governmental desire for them to regulate it - and local government would be outcompeted by imported goods that use antibiotics.