A conversation with James Rives (University of North Carolina at Chapel Hill) on the history of ancient animal sacrifice in the Roman world. We focus on its decline and eventual demise in the third and fourth centuries. Animal sacrifice was caught up in the conflicts between the Roman emperors and the Christian Church, which endowed it with an importance it had not had before. The conversation is based on James' recent book Animal Sacrifice in the Roman Empire (31 BCE-395 CE): Power, Communication, and Cultural Transformation (Oxford University Press 2024).