Conceptual framework for considering animal welfare in sustainability assessments of foods

In recent years, many studies analyzed the environmental, health and economic implications of the production and consumption of different foods – and, on this basis, evaluated their sustainability. However, associated impacts on animals have remained largely unexamined and existing assessment approaches are still immature and often lack reflection on their normative assumptions and resulting implications. As animal welfare concerns increase, this represents a shortcoming, leaving a critical sustainability issue without due consideration. To address this, we develop a conceptual framework that guides the key decisions for assessing animal welfare impacts of foods. The framework is derived from an integrative literature review and revised following external feedback from expert focus groups. It bridges the research fields of food system modeling, animal welfare science and animal ethics and can guide researchers in developing assessment approaches and assessing animal welfare impacts of foods, from individual food items to whole diets. The framework also directs transparent communication of the most important assessment decisions. We outline key considerations for animal welfare assessments of foods, highlight associated challenges and discuss quality criteria as well as technical and normative strategies to address them. Our contribution provides a basis for future research to integrate animal welfare into sustainability evaluations of food and investigate tradeoffs and synergies with environmental, social or economic issues. Following this framework in future assessments facilitates the integration of animal welfare into food-related policy assessments and public decisions.