This chapter explores about the history of knowledge and technology transfer between humans and animals, and between human and veterinary medicine in the field of trauma surgery. It explores the movements of sheep and humans in the fields of biomedicine and agriculture as part of the study about the coming-into-being of sheep as laboratory animals in the field of orthopedic surgery in the 1960s. The chapter focuses on the traditional collectives of sheep were incorporated in a new collective and how they became part of traffic of thinking about fracture care and broken bones by being enacted as bone sheep. As sheep are ruminants and herbivorous animals, their bone metabolism differs a great deal from that of humans. Thus, the whole culture of sheep surgery, operating tables, instruments and tools had to be invented, modified and scaled for sheep.