Tim Cook answered
Boer goats originated in South Africa in the early 1900s and began to be widespread in the US in the early 1990s. Of all the goat breeds, the Boer goat is probably the best breed to keep as a pet. Indeed, Boar goats are known as the 'gentle giants' of the goat world.
Healthy Goat, Happy Owner
Despite their hardiness, Boer goats are still susceptible to certain diseases and ailments. On purchasing a Boer goat, register it with the nearest appropriate as soon as possible. Common goat complaints include mastitis, bottlejaw, pinkeye, worms, hoofrot, parasits, ketosis and caprine arthritis encephalitis virus (CAEV) which causes swelling to the goat's knees. Click here for more on CAEV.
Here's a film to get you started with Boer goats: