The Rat Model ecosystem is organized around a three‑tier value chain that moves from upstream inputs through midstream integration to downstream application. Upstream participants supply the biological substrates—live rats, specialized diets, and housing equipment—required to establish colonies. Midstream actors, including breeders, technology vendors, and system integrators, transform these inputs into standardized, phenotypically characterized models and accompanying data‑capture platforms. Downstream, distributors and service firms handle logistics, regulatory paperwork, and colony health, delivering ready‑to‑use kits to research institutions, pharmaceutical companies, and academic laboratories that generate experimental data and insights.