The domestic animals that reside on this farm are predominantly heritage breeds of livestock. ALBC writes
These breeds are threatened because agriculture has changed. Modern food production now favors the use of a few highly specialized breeds selected for maximum output in a controlled environment. Many traditional livestock breeds have lost popularity and are threatened with extinction. These traditional breeds are an essential part of the American agricultural inheritance. Not only do they evoke our past, they are also an important resource for our future.
We raise heritage animals not just for conservation purposes. These breeds are hardier, more thrifty, beautiful, live longer, and have more flavor. For more information on heritage breeds please visit the American Livestock Breeds Conservancy: http://www.albc-usa.org.