Basic information about sheep

Taxonomy. 
Taxonomy is the classification of organisms into groups based on similarities of origin, structure, etc. Sheep are closely-related to other farm livestock, especially goats. 

Taxonomy of sheep
 Kingdom     Animalia     Animal
 Phylum     Chordata     Vertabrae (has spinal cord)
 Sub-phylum     Vertibrata
 Class     Mammalia     Mammal (nurses young)
 Order     Ungulata     Hoofed animal
 Sub-order     Artiodactyla     Even toed
 Family     Bovidae     Hollow horns
 Sub-family     Caprinae     Sheep and goats
 Genus     Ovis     Sheep
 Species     aries     Domestic sheep

Early domestication
Domestication is when an organism is trained or adapted to live with people. Domestication often changes the appearance and behavior of the organism. While dogs were the first animal to be domesticated, sheep and goats are tied for second and are the first animals to be domesticaled for agricultural purposes. They were domesticated over 10,000 years ago.