This chapter characterizes the two different housing arrangements for monkeys in the lab and in the zoo, and the human-animal relationships taking place within them. It looks at the welfare provisions introduced as elements of a practice that seek to shape animal behavior in accordance with the animals' natural features in a publicly acceptable way without jeopardizing their potential value for research. In Western culture, "nature" and "naturalness" are counter-concepts to control and exploitation. Therefore references to naturalness certainly had the effect of making further instrumentalization of the Skt. Hans Hospital (SHH) monkeys less visible. As members of the experimental animal population the monkeys in SHH were fully integrated in human society, but separated from humans and conspecifics by steel bars. The historian Reviel Netz looks upon housing of animals as a basic form of movement regulation aiming at control and ultimately value production.