1. Introduction Rehoming laboratory animals that are alive and healthy after animal experiments, or that have not been used and are surplus, is common practice in animal laboratories. However, this is especially true for larger companion animal species. As normal as it seems to grant cats, dogs and horses a good life after the lab, it seems normal to routinely kill smaller surplus animals such as mice and rats [1,2,3]. This has probably to do with how we were raised: our culture.
