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
Mountain and moorland pony breeds graze freely on lush forage may develop related health problems, including laminitis. The various types range from about to over . Shetlands are smaller, not to exceed . Shetlands are measured in inches. Some breeds, such as the Exmoor, are uniform in colour and pattern, but others permit a wide range of colours. However, the Shetland is the only M&M breed that can be skewbald or piebald, though even Shetlands cannot be "spotted." Several types of mountain and moorland ponies still live in a semi-feral state on unenclosed moorland or heathland. These areas are usually unfenced common land, on which