We have a rigorous screening program that consists of both testing and quarantine of incoming animals plus annual screening of adult ewes. In addition, farm visitors are asked to not wear their “barn boots” when visiting and we require them to disinfect their shoes upon arrival. Our screening protocol consists of blood tests for three of the most common contagious diseases in sheep: Ovine Progressive Pneumonia (OPP aka small ruminant Lentivirus or CAE in goats), Johnes Disease, and Caseous Lymphadenitis (CL aka cheesy gland). When acquiring animals (rams), we prefer to test animals before they leave the farm of origin, but either way, all incoming animals are quarantined for 3 or more weeks separate from other sheep. In addition, a rotating 20% of the brood ewe flock are tested for OPP, CL, and Johnes annually. Incoming rams over 1 year of age are now tested for Brucella ovis as well. All testing in recent years has been conducted by Sage Labs in Emmet, ID or at WADDL, Washington State University in Pullman, WA.