Used in research settings to quantify vasoactive intestinal peptide (VIP) levels in chicken biological samples such as plasma, serum, or tissue homogenates. This assay is particularly valuable in studies related to avian neuroendocrinology, immune function, and gastrointestinal physiology, as VIP plays a role in smooth muscle relaxation, secretion regulation, and inflammatory responses. The kit enables high-throughput, sensitive, and specific detection of VIP, supporting investigations into stress responses, circadian rhythms, and metabolic regulation in poultry. It is not intended for diagnostic use but serves as a critical tool in experimental biology and veterinary research.