Societal views on animals are rapidly changing and have become more diversified: can we use them for our own pleasure, and how should we understand animal agency? These questions, asked both in theoretical discourses and different practices, are also relevant for our understanding of horses and the human–horse relation. Equine Cultures in Transition stands as the first volume to bring together ethical questions of the new field of human–horse studies. For instance: what sort of ethics should be developed in relation to the horse today: an egalitarian ethics or an ethics that builds upon asymmetrical relations? How can we understand the horse as a social actor and as someone who, just like the human being, becomes through interspecies relations? Through which methods can we give the horse a stronger voice and better understand its becoming? These questions are not addressed from a medical or ethological perspective focused on natural behaviour, but rather from human acknowledgement of