True food allergy in dogs requires a strict elimination diet trial for diagnosis, with accurate identification of dietary triggers enabling effective long-term management.
Dogs with undiagnosed food allergies suffer chronic pruritic skin disease with associated secondary infections, self-trauma, and behavioral changes from constant discomfort. The diagnostic elimination trial is the only reliable way to identify food allergy, but it requires strict compliance for 8-12 weeks - a significant commitment. Dogs who complete successful elimination trials and have their dietary trigger identified can achieve excellent quality of life on appropriate long-term diets. The welfare benefit of accurate food allergy diagnosis extends throughout the dog's life.