The Pumi (in Hungarian, the plural form is pumik) is a medium-small breed of sheep dog from Hungary. They are versatile stock dogs equally adept at gathering, driving and keeping stock under control. The coat (black, white, grey, or fawn) is a combination of wavy and curly hair forming curls all over the body. The breed is closely related to the longer-haired Puli. Hip dysplasia is an abnormal formation of the hip socket that can lead to serious joint problems for the dog. It is probably the most common health problem specific to the breed. Hip dysplasia is an abnormal formation of the hip socket that can lead to serious joint problems for the dog. It is probably the most common health problem specific to the breed.