The LIPH4SAS research infrastructure is dedicated to livestock phenotyping and enables experiments, phenotyping and biological sampling for the animal research community, with a view to promoting the transition to more sustainable agricultural and food systems based on agroecological principles. LIPH4SAS comprises eight experimental units, of which four are dedicated to ruminants, two to pigs and two to trout. It also includes a platform dedicated to the in-depth study of livestock physiology and a structure responsible in charge of data management and the development of phenotyping tools. LIPH4SAS has large facilities (2,000 cattle, 4,500 sheep/goats, 7,000 pigs …), including many valuable genetic resources (original populations, selected lines, homozygous trout lines, etc.), managed in a variety of geographical areas and breeding systems. It provides skills and tools for detailed and multi- scale phenotyping (surgery, in and ex vivo imaging, respiratory chambers, etc.) and horizontal phenotyping on large groups of animals (slaughterhouses, equipment for measuring growth, feed intake and efficiency, body composition, behavior and health, product quality, greenhouse gas emissions, etc.). The aim of LIPH4SAS is to provide a global service that promotes interaction between scientific communities, harmonizes practices to ensure the highest level of expertise as possible and ethics in animal experimentation and welfare, encourages innovation in animal science and facilitates access to Fair data.