The Gottlieb Animal Health and Conservation Center is in a restricted area of the zoo. Among other features, it includes a state-of-the-art intensive care unit, an on-site commissary, a surgical suite with observation area, and research facilities. In 2007 the facility handled 853 medical cases. The smallest patient treated was a spider tortoise (0.08 kg) and the largest was an Asian elephant (4,826 kg). It is named after Robert and Suzanne Gottlieb.