5/10/2023 0 Comments Sighthound softwareSighthounds such as the Saluki/Sloughi type (both named after the Seleucid Empire) may have existed for at least 5,000 years, with the earliest presumed sighthound remains of a male with a shoulder height around 54 cm, compared to a Saluki, appearing in the excavations of Tell Brak dated approximately 4,000 years before present. However, there is increasing evidence that dolichocephalic dogs, thanks to a higher number of retinal ganglion cells in their “visual streak”, retain more heightened sensitivity than other dog types to objects and rapid movement in the horizontal field of vision. There is no science-based evidence to confirm the popular belief that sighthounds have a higher visual acuity than other types of dogs. Dolichocephalic dogs have a wider field of vision but smaller overlap between the eyes and therefore possibly poorer depth perception in some of their field of view than brachycephalic dogs most, if not all, dogs have less visual acuity than their antecedent the wolf. Wolves and other wild dogs are dolichocephalic or mesaticephalic, but some domestic dogs have become brachycephalic (short-headed) due to artificial selection by humans over the course of 12,000 years. This shape can create the illusion that their heads are longer than usual. The typical sighthound type has a light, lean head, which is dolichocephalic in proportion. ![]() Sighthounds have unique anatomical and physiological features likely due to intentional selection for hunting by speed and sight laboratory studies have established reference intervals for hematology and serum biochemical profiles in sighthounds, some of which are shared by all sighthounds and some of which may be unique to one breed. Sighthounds must be able to capture fast, agile prey such as deer, and hares, so they have a very flexible back and long legs for a long stride, a deep chest to support an unusually (compared to other dogs) large heart, very efficient lungs for both anaerobic and aerobic sprints, and a lean, wiry body to keep their weight at a minimum. They must be able to detect motion quickly, so they have keen vision. ![]() These dogs specialize in pursuing prey, keeping it in sight, and overpowering it by their great speed and agility. ![]() ![]() The dolichocephalic head proportions of a typical sighthound
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