Humans have probably shared their homes with dogs ever since they first settled. So it could be argued that there is no such thing as "human society" without including animals as part of it. Our long shared history with dogs has even been described as a form of co-evolution . And a new study my colleagues at Cambridge and I published shows golden retrievers and humans seem to share a genetic basis for at least some behaviour. Related: We May Have Bred Neurodiversity Into Our Pets, Expert