COAT
There are two types of Chow coat: rough and smooth, and both are double-coated. In the rough coat, the outer coat is abundant, dense, straight, and off-standing, rather coarse in texture, with a soft, thick, woolly undercoat. Puppy coat is soft, thick, and woolly overall. The coat forms a profuse ruff around the head and neck, framing the face, and is generally longer and fuller in dogs than in bitches. The tail is well feathered. Coat length varies markedly between individual Chows, and thickness, texture, and condition should be given greater emphasis than length alone — obvious trimming or shaping is undesirable, though trimming of the whiskers, feet, and metatarsals is optional.
The smooth-coated Chow has a hard, dense, smooth outer coat with a definite undercoat, but without the obvious ruff or feathering on the legs and tail seen in the rough variety — and it sheds, mats, and repels dirt more easily than the rough coat, which makes it the lower-maintenance of the two.