Human-Animal Relational Theory (HART) is a therapeutic model that brings animals into the therapy room in order to enrich the existing relationship between therapist and client. Animals, especially social animals like dogs and horses, can attune keenly to our emotions and inner states, and their presence can bring to light dynamics that may have otherwise remained hidden. An animal may notice distress and respond by offering comforting touch and attention, or may detect pain that was unknown even to the person experiencing it, so that the person can begin to experience the relief of recognition and witness. The HART model offers a more expansive view of the therapeutic relationship that deepens the possibilities for healing and growth.