Breadcrumb Home Anthrozoology ANZ-431L ANZ-431L: Modalities Equine Assisted Services Lab Download as PDF Program Anthrozoology Credits 1 Modalities in Equine Assisted Services Lab. This course is the lab component to ANZ 431. Prerequisites Take ANZ-231 ANZ-233 and ANZ-233L. Corequisites Take ANZ-431 concurrently. Semester Offered Annual Spring Semester