When we improve animal welfare, we also improve sustainability and reduce emissions.
Healthy animals are simply more productive, which improves the efficiency of the food system. Animals that struggle with disease require more resources to aid in their recovery, and they may never produce as much as if they had never fallen ill.
For example, a dairy cow that receives a medication to prevent an infection by parasitic roundworms produces more milk, enabling the farmer to meet production needs with fewer animals. Likewise, chickens who are vaccinated against infectious bursal disease virus (IBDV) will lay more eggs while requiring less feed, lowering the carbon footprint associated with the production of chicken feed. Read more here.