In August 2018, newspapers around the world reported on the case of an orca nicknamed Tahlequah whose newborn calf died 30 minutes after birth. Tahlequah was witnessed carrying the dead body for 17 days and over 1,000 miles, in what the media called a ‘tour of grief’(Cuthbert and Main 2018). In May 2014, CCTV cameras in California captured the moment in which a four-year-old child was attacked and pulled off his bike by a neighbourhood dog. At that moment, the boy’s family cat appeared and chased the dog away, thus saving the child. It was later reported that the family had adopted the cat five years earlier, after she had followed them home from the park, and that she had formed a strong bond with their son (Hooton 2014). In December 2014, a monkey was reported to have saved the life of another monkey who had been electrocuted after walking on the electric wires at an Indian train station. The monkey was filmed apparently trying to revive her unconscious friend by rubbing, hitting, biting, and dipping her in water until, after some minutes, the stunned monkey at last showed signs of life (Guardian 2014). These sorts of observations have led academics and the public alike to ask whether morality is shared between humans and other animals. Some philosophers explicitly argue that morality is unique to humans, because moral agency requires capacities that are only demonstrated in our species, such as self-awareness, reflective scrutiny, the capacity to construct and act according to rules, normative self-government, or moral concepts (eg Kagan 2000; Kitcher 2006; Korsgaard 2006; 2018; Dixon 2008). Other philosophers argue …