Used in research settings to measure orexin peptide levels in biological samples from chickens. Helps in studying appetite regulation, feeding behavior, and energy balance in poultry. Commonly applied in veterinary research, animal physiology studies, and agricultural science to understand metabolic disorders, growth performance, and the impact of diet or stress on feed intake. Enables quantitative analysis of orexin A or B in serum, plasma, or tissue extracts, supporting investigations into sleep-wake cycles and neuroendocrine function in avian species.