Welfare biology is the study of living things considered as moral patients. The discipline's main purpose is to determine the circumstances affecting wild animal welfare. Applied welfare biology, in turn, is the application of welfare biology to identify interventions that affect the welfare of wild animals. The field was established by economist Yew-Kwang Ng in a seminal 1995 paper.
Carpendale, Max (2015) Welfare biology as an extension of biology: Interview with Yew-Kwang Ng, Relations, vol. 3, pp. 197–202.