Dating a horsey girl
Thus, the hip angle is not necessarily correlated to the topline of the croup.
Horses bred to gallop need a good length of croup and good length of hip for proper attachment of muscles, and so unlike angle, length of hip and croup do go together as a rule.
The Arabian also developed the high spirit and alertness needed in a horse used for raiding and war.
The hip angle is determined by the attachment of the ilium to the spine, the structure and length of the femur, and other aspects of hindquarter anatomy, which is not correlated to the topline of the sacrum.
Thus, the Arabian has conformation typical of other horse breeds built for speed and distance, such as the Thoroughbred, where the angle of the ilium is more oblique than that of the croup.
In the ideal Arabian it is long, allowing flexibility in the bridle and room for the windpipe.
Other distinctive features are a relatively long, level croup, or top of the hindquarters, and naturally high tail carriage.