Instead it says 'at includes tan point and saddle tan, both of which look tan point at birth. Modifier genes in saddle tan puppies cause a gradual reduction of the black area until the saddle tan pattern is achieved.' 'Tan point' refers to the blanket type from the typical tan eyebrows, muzzle and socks. In some dog breeds, such as bloodhounds, the olfactory sense has nearly 300 million receptors.The large, long pendent ears serve to prevent wind from scattering nearby skin cells while the dog's nose is on the ground; the folds of wrinkled flesh under the lips and neck—called the shawl—serve to catch stray scent particles in the air or on a nearby branch as the bloodhound is scenting, reinforcing the scent in the dog's memory and nose.