In temperament the Lhasa is confident and self-possessed, and quick to warn of anything unfamiliar. With its own household it is affectionate and often comical, though it keeps a strong independent streak and tends to think for itself rather than simply obey.
Bred as an indoor watchdog with keen hearing, it is a small, sturdy dog, longer in the body than it is tall, with a level back and a well-feathered tail carried over the back, often ending in a kink. Its coat is long, heavy and straight, hard rather than silky, over a dense undercoat. The hair falls over the eyes and forms a beard and whiskers. The breed comes in a wide range of colours, including gold, sand, honey, slate, smoke, dark grizzle, black, white and brown.
The Lhasa Apso's modern form was defined in Britain during the nineteen-thirties, when breeders drew up standards separating it from the Tibetan Terrier and the Shih Tzu, with which it had often been confused. Genetic studies have placed it among a small group of breeds whose ancestry appears to have diverged early from that of most modern Western breeds.