The thesis examines, through qualitative methods, the role of the horse in equine-assisted social work (EASW) as well as what facilitates or constrains the role of the horse. Specifically, should interaction be understood in the same manner regardless of which individuals that participate? The thesis is based on empirical data collected throughinterviews with eight staff members and nine female self-harming clients, aged 15–21 years, in a residential treatment facility. In addition, video recordings of the human-horse interaction of three staff members and four clients were analyzed, resulting in the additional issues addressed in a second interview. Critical dialogues between patterns and fragmentations in the narratives and video-recordings, as well as a dialogue with participants, while they were viewing videos of their own EASW sessions, led to the conclusion that adding a horse could qualitatively change therapeutic relationships.  The results are presented in four articles that provide an image of the complexity of EASW. The summary chapters focus on a synthesized analysis, based on Goffman’sdramaturgical perspective and Hochschild’s emotional rules in which the concepts were applied: backstage, frontstage, impression management, stigma, emotional management, deep acting and surface acting. The analysis demonstrated that defense mechanisms are reduced when the horse is perceived as non-judgmental and therefore less intimidating. Furthermore, the analysis suggests that it is crucial that the horse is regarded as a subject, a transitional object, which can silence the inner critic and create a ‘moment of silence’ that contradicts stigmas and enablesadolescents to regulate their emotions. This leads to possibilities to be more authentic and the relationship between staff and adolescents to be perceived as more authentic.  In summary, the work presented in this thesis contributes to increased knowledge about the role of the horse in opposing impression management and surface acting, depending on the high demands on staff to reach outcomes regarding communication, self-confidence, self-esteem, and self-image. The different triads consist of different liaisons, giving rise to unique combinations and the potential to avoid emotional dissonance. The quality of the relationships seems to depend on staff and clients’ attachment orientations.  Keywords: Authentic, Emotional work, Equine-assisted social work, Impression management, Moment of silence, Self-harming adolescents, Stigmatization