Dairy cows are able to convert fibrous materials, such as grass, roughage, and by-products from the food industry, into milk and meat, which justifies their role in food production. However, modern dairy farming is associated with major sustainability challenges, including greenhouse gas emissions. In order to develop sustainable future production, it is important to implement existing knowledge and fill knowledge gaps. The aim of this study was to systematically map the scientific literature on environmental, economic, and social sustainability at farm level in dairy farming. Literature published between January 2000 and March 2020 and with the geographical focus on Europe, North America, and Australia–New Zealand was included. In total, the literature search resulted in 169 hits, but after removing duplicates and papers outside the study scope only 35 papers remained. Of these, only 11 dealt with the three dimensions of sustainability, and several of these only mentioned one or two of the dimensions or set them in relation to that/those actually studied. Overall, the selected literature did not clearly explain how aspects of sustainability are interlinked, so possible negative or positive interactions between different aspects of sustainability dimensions remain unidentified.

In this study, we sought to identify the use and non-use values that underlie farmers’ decision making with respect to animal welfare, based on in-depth interviews with 50 dairy farmers in Sweden. We identified use values related to: being able to continue the business, earning a living from the business, not being tied to the farm (i.e. having time available for other things), product quality, and work environment. We also identified non-use values related to avoidance of suffering, being able to further improve the welfare of dairy cows, the dairy farmer feeling good him/herself, ethical considerations, a feeling of doing the right thing, and animals eating properly (i.e. functioning as dairy cows should). Understanding the values underlying dairy farmers’ decision making with respect to animal welfare is an important step in understanding why these farmers work with animal welfare. The results are useful in improving communications from authorities and farm advisors to farmers, as a strategy to gain better acceptance for improved animal welfare standards; in designing product certification schemes in the food industry; and in communicating to the public the values influencing production of dairy products