This study explores the historical context of human-animal relationships and examines the important ways that humans benefit from various types of interactions with domesticated animals. Therapeutic approaches that incorporate animals have been shown to have multiple benefits, including improved physical and mental health. Although this area of study is still largely overlooked in scientific fields of study, including social work, Animal Assisted Therapy (AAT) has become increasingly prevalent in various mental health settings. Despite its popularity and anecdotal support, research on the benefits of AAT with children is minimal; there are no studies examining the ways in which this approach impacts children under the age of five. Thirteen preschool aged children from a community-based early intervention program participated in a 16-week pilot study on AAT. The children were considered atrisk for potential behavioral, emotional and psychological challenges due to a constellation of factors, including developmental delays, poverty and early childhood trauma. This research includes case studies for each of the participants, with detailed information about the children as well as an account of their therapeutic experiences during the 16-week program. Thematic Analysis was used to analyze the data. Broad themes emerged in two main areas: demographic factors and intervention strategies. Each of these themes is explored in depth to highlight the most salient features of the cases and effective therapeutic processes. Findings indicate that the population studied shared various characteristics, including poverty, trauma history and complex family sessions. Preschool-aged children