For 70 years, researchers worldwide have trusted Charles River as their source for the highest quality animal models and related services. Offering a broad selection of species and strains, we support today’s most critical research with the timely delivery of study-ready, preconditioned and genetically engineered animals. Our leading scientists and global network of AAALAC-accredited vivaria and breeding facilities provide clients with accessible, expert management of outsourced colonies, biology services for line creation, maintenance and preservation, advanced diagnostics, and health monitoring to guarantee the long-term success of their work. Charles River: More than a mouse.