Conformity
Sheep are ruminant mammals typically kept as livestock. One of the earliest animals to be domesticated for agricultural purposes, sheep are raised for fleece, meat and milk. A sheep’s wool is the most widely used of any animal, and is usually harvested by shearing.
Being a key animal in the history of farming, sheep have a deeply entrenched place in human culture, and find representation in much modern language and symbology. As livestock, sheep are most often associated with pastoral imagery. In contemporary English language usage, people who are timid or easily led are often compared to sheep.
Sheep are prey animals with a strong gregarious instinct, and a majority of sheep behaviors can be understood in these terms. The dominance hierarchy of sheep and their natural inclination to follow a leader to new pastures were the pivotal factors in it being one of the first domesticated livestock species. All sheep have a tendency to congregate close to other members of a flock, although this behavior varies with breed. Farmers exploit this behavior to keep sheep together on unfenced pastures and to move them more easily. Shepherds may also use sheepdogs in this effort, whose highly bred herding ability can assist in moving flocks.
Flock dynamics in sheep are only exhibited in a group of four or more sheep. Fewer sheep may not react as normally expected when alone or with few other sheep. For sheep, the primary defense mechanism is simply to flee from danger when their flight zone is crossed. Cornered sheep may charge or threaten to do so through hoof stamping and aggressive posture. This is particularly true for ewes with newborn lambs.
In displaying flocking, sheep have a strong lead and follow tendency, and a leader often as not is simply the first sheep to move. However, sheep do establish a pecking order through physical displays of dominance. Dominant animals are inclined to be more aggressive with other sheep, and usually feed first at troughs. Primarily among rams, horn size is a factor in the flock hierarchy. Rams with different size horns may be less inclined to fight to establish pecking order, while rams with similarly sized horns are more so.
Sheep can become stressed when separated from their flock members. They can recognize individual human and ovine faces, and remember them for years. Relationships in flocks tend to be closest among related sheep. In mixed breed flocks, same breed subgroups tend to form, and a ewe and her direct descendants often move as a unit within large flocks.
Sheep are frequently thought of as extremely unintelligent animals. A sheep’s herd mentality and quickness to flee and panic in the face of stress often make shepherding a difficult endeavor for the uninitiated. Despite these perceptions, a University of Illinois monograph on sheep found them to be just below pigs and on par with cattle in IQ, and some sheep have shown problem solving abilities.
A flock in West Yorkshire, England allegedly found a way to get over cattle grids by rolling on their backs. In addition to long term facial recognition of individuals, sheep can also differentiate emotional states through facial characteristics. If worked with patiently, sheep may learn their names, and many sheep are trained to be led by halter for showing and other purposes. Sheep have also responded well to clicker training. Very rarely, sheep are used as pack animals. Tibetan nomads distribute baggage equally throughout a flock as it is herded between living sites.

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