The Kuchi dog breed possesses a very rich gene pool and the dogs adapt well to varying environments. It also means that gene expression can vary greatly from one individual to another. For that reason, it is often difficult for an unaccustomed observer to determine what makes a particular dog a true Kuchi dog, or what type of a Kuchi dog it is. In general, the Kuchi dog is large, often giant dogs, with a coat that can be short, medium, or long, backed by thick underwool. They vary in height, reaching from at the withers for the females and from and more for the males. Their weight ranges from about for the female dogs and from and more for the male dogs. It seems probable that the so-called "dogs of Ghor" should be included among these "Kuchi dogs": "The dogs of Ghor are mentioned in the earliest descriptions of the province and were always regarded as particularly special mastiffs. According to the
Seljuk chronicles of the eleventh century, there was:'
A remarkably fine breed of dogs in Ghor so powerful that in frame and strength every one of them is a match for a lion.' The king of the
Turquoise Mountain had two Ghor dogs, one named after him and one after the ruler of
Ghazni. He would make them fight. It was dangerous to be around him on days when his namesake lost. These dogs formed part of the tribute from the
Ghorids to the Seljuk and became such proverbial parts of Islamic culture that a medieval scholar is recorded as saying that '
Avicenna could not fight with a dog from Ghor'. The shape of the head of a Kuchi dog can vary from a wedge-type head to a brick-type or a bear-type skull, the last one being associated mainly with the dogs of the mountain variety. Their tails are usually docked by about one-third of their length and usually point straight up or at a slight angle. Traditionally, their ears are cropped, almost to the very base. The Kuchi dogs are tall dogs, with a straight backline, which usually forms a square profile with the front and hind legs. The neck is usually long and thick, with plenty of excess skin hanging from the base of the jaw to the chest. The head is carried horizontally, or at a slight downward angle, with eyes staring straight ahead. The muzzle is dry and muscular. Their body is often covered with dark spots that do not show through the coat. These spots can also cover the inside of the mouth, the bridge of the nose and the abdomen. The color of the coat comes in many varieties and is of no importance to determine the breed or the type of Kuchi dog. Neither is the length or structure of the hair. Most often, a strip of longer, more wiry hair covers the entire length of the backline, while the neck area is packed with thick and slippery underwool, as well as hair that is slightly longer than over the rest of the body. The tooth sizes range from small in some females to very large in males, with the fangs often exceeding 1¼". The shape of the fangs can form a hook with a thicker base and the point directed toward the inside of the mouth or can be straighter and tusk-like, much like a wolf's. There are three main regional types recognized, belonging to one of two body types of dogs – the lion-type and the tiger-type. Those are determined depending on the build and the motor characteristics. ==Subvariants and types==