They may be a little temperamental with hyper or larger breeds, but generally, the Shih Tzu gets along well with other pets. They are generally well behaved and suitable for families. Floppy ears are covered with long fur, and the heavily furred tail is carried curled over the back. The coat may be of any color, though white and with blazes of grey are frequently seen. A very noticeable feature is the underbite, which is required in the breed standard. An interesting point (and often a point of confusion) is that while the coat color of those with black pigmented skin (nose, lips, pads, also referred to as 'leather') is determined by the color of the coat itself; the coat color on dogs with either liver or blue pigment is categorized by the color of the pigment.