There are other breeds less well known and less important, but the breeds of the British isles are by no means confined to that locality. They have been taken to the United States and to other countries. In fact, some variety of domestic sheep can be found in every land, and no animal is more useful to its owner. In spite of the various breeds, the characteristics of all domestic sheep are similar. They have not the courage and independence of their cousins, the wild sheep of the mountains. These delight to roam to the highest altitudes, some species being found as high as 22,000 feet above the level of the sea. No other animal save the musk ox and the mountain goat can exist at this height. Doubtless the domestic sheep would thrive better if it could escape the low levels and the plains, for, like the wild sheep, it is a mountain-loving creature. It has adapted itself to the lower altitude, but at a great loss of its original characteristics. It has to an extreme extent become a dependent animal, unable to care for itself, totally lacking in courage and resources, very easily frightened and without marked character. An entire flock is easily startled by any unusual noise; thunder and lightning completely unsettles them, and human efforts to quiet them often prove unavailing. Brehm tells us that “on the steppes of Russia and Asia the shepherds often have the most arduous tasks in preserving their charges. During a snowstorm or thunderstorm the panicstricken flocks disperse in a wild stampede, rushing out into the wastes of the steppe like senseless creatures, and then resignedly suffer themselves to be snowed under or to freeze without making any attempt to shelter themselves from the storm or even to seek for food.” In Russia a goat is generally used as a leader for a flock of sheep, but even a goat is not always able to keep the stupid animals under proper guidance. During a thunderstorm they huddle together and cannot be made to move. “If lightning strikes into the flock,” says Lenz, “many are killed at once; if fire breaks out in the sheepfold the sheep do not run out, but, on the contrary, sometimes rush into the fire.” The best manner of rescuing sheep from a burning fold or structure is to let the sheep dog to which they are accustomed, drive them out. To a certain degree, however, the sheep exhibits mental capacity. It learns to know its keeper, obeys his call and displays a certain amount of affection and docility towards him. It seems to have a liking for music, or at least it patiently and passively listens to the bagpipe playing of the shepherd, and it has evidently some premonition of impending changes in the weather.