"The harder farmers push animals beyond their natural limit, and the more closely animals are confined, often the greater the risk of disease and the heavier the reliance on vets to keep herds alive. Their weapon of choice is antibiotics. According to Dil Peeling, who qualified as a vet in the UK but spent much of his career working in developing countries: "A vet's worth is now measured by his or her ability to deliver on production and animal health – not welfare. It is difficult to persuade vets who have invested so much of their careers in propping up intensive farming to turn their back on such systems.""