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
Bulldog breeds Bulldog breeds Bulldog breeds is a collective name for various breeds of dog of a particular type, also known as bull breeds. The blood sport of dog-baiting animals has occurred since antiquity, most famously in the Roman Colosseum, a direct precursor to the modern Spanish sport of bullfighting. In the post-Roman era, baiting, per se, was most closely associated with the English, who pursued it with utmost earnestness. The pastime flourished, reaching the peak of its popularity during the sixteenth century. The Bullenbeisser, also known as the "German Bulldog", was a breed from Germany known for its strength and agility.