Animal genetic resources for food and agriculture of animal genetic resources includes diversity at species, breed and within-breed level. Known are currently 8,800 different breeds of birds and mammals within 38 species used for food and agriculture. The main animal species used for food and agriculture production are cattle, sheep, goats, chickens and pigs. In the livestock world, these species are often referred to as "the big five". Some less-utilized species include the dromedary, donkey, bactrian camel, buffalo, guinea pig, horse, rabbit, yak, goose, duck, ostrich,partridge, pheasant, pigeon, and turkey. The history of animal genetic resources begins about 12,000 to 14,000 years ago. The domestication of major
Vulnerable dog breeds of the United Kingdom Trust. The breeds on the list have been promoted at events such as Discover Dogs and Crufts, and by asking that owners of these breeds mate their dogs rather than having them spayed. The majority of the list come from the Terrier Group, a group mostly derived from breeds with backgrounds in the British Isles. The most marked drop in popularity is that of the Sealyham Terrier, which registered 1,084 breeds in 1938, but by 2004 was registering only sixty dogs a year. In October 2011, British magazine "Country Life" highlighted the breed on its front cover, with the heading