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
Sighthound and pariah group Hounds are hunting dogs that hunt by endurance, following the scent of a game animal (scent hounds); or by speed, following the animal by sight (sighthounds). There are a few breeds of the "sighthound type", and many breeds of the "scent hound" type. Pariah dogs refers to a broad class of specific "types" of feral dogs. Any of these animals, if a breed club develops and if the dogs are sufficiently documented according to kennel club rules, might apply for listing as a breed of dog. Kennel clubs assign breeds of dogs to "Groups", which are loosely based on breed