Over the past decade, Food Protein Enterocolitis, or FPIES, has emerged as the most actively studied non–IgE-mediated gastrointestinal food allergy because of its acute onset, severity of symptoms, and distinctive clinical features. Yet as a rare allergic disorder of infancy and young childhood, it is often misinterpreted and misdiagnosed in clinical practice, leading to difficult treatment paths for patients and their families. Joining Dr. Renee Matthews to present a case history from the vantage point of a patient's mother, including challenges faced in reaching the correct diagnosis and starting effective treatment regimens, is Jennifer Kandt.