What is CAE why is it important to buy from a tested herd?

Caprine Arthritis Encephalitis (CAE) is a virus that affects goats in multiple ways. Most often characterized by big knees, the virus also does irreparable damage to the lungs as well and affects the immune system leaving the goat defenseless against most common ailments. CAE is the bane of many goat producers and much emphasis is placed on raising “CAE free” goats.