According to the BBC, certain types of chickens are in danger of extinction. One third of these are in danger of disappearing. Each Week Domestic animals are becoming extinct at the rate of two breeds per week. One thousand domestic species have vanished in the past 100 years.
Scientists say commercial farmers rely on certain species that produce the most meat or milk.
As worldwide agriculture becomes more standardized, these economically productive breeds are adopted all over the world, often making indigenous animals unnecessary. The international pig and chicken industries rely on the fewest varieties. But hundreds of different types of buffalo, yaks, ducks, goats, sheep, cattle, and ostriches are also in danger. About one third of the 259 recorded types of domestic farm animals in the U.S. and Canada could disappear soon. Using the same breeds all over the world is potentially hazardous because a species that thrives in one climate may not do as well in another.