Our presentation aims to identify and explain how equine-assisted therapy (EAT) is an important part of the healing journey for many children who are able to access this form of therapy. We describe what happens when a young person who has experienced complex trauma is given the opportunity to get up close with, and build a relationship with a non-judgemental, non-verbal, affiliative animal, up to ten times their size. Equine Assisted Therapy (EAT) is an interaction between horses and people, provided by registered mental-health professionals with specific training in the field. A central goal of EAT is to strengthen attachment capacities normally established in childhood which may have been significantly disrupted by the experience of abuse and neglect. This is possible because working with horses provides unique biopsychosocial experiences that tap into our social engagement and other neurobiology with positive effects. Synergistic co-regulation between horse, therapist and client encourages the remodeling of arousal pathways and the development of psychosocial skills at all brain levels to build capacity for healthy relationships. The intersubjectivity developed during this experiential, somatically influenced learning can be difficult to replicate in a clinical setting. However, if the inclusion of horses in the therapeutic context provides more than just a buy-in for disconnected young people, then there is an imperative to identify what factors are responsible for generating the significant human-horse relational moments responsible for the therapeutic impact. More importantly, how do we ensure this form of therapy becomes more accessible, affordable, and accountable?