Bull terrier

Bull terrier

a medium-sized (50-60 lb), very solidly built dog with narrow, deeply sunken triangular eyes, thick neck; the face has a distinctive flat profile without a stop. The dog was originally bred for pit fighting. There are two varieties, all-white or colored, which is any other, including spotted, than white. In some countries, a miniature variety is also recognized as a separate breed. The breed is subject to congenital renal disease, lethal acrodermatitis, and the white variety may be affected by congenital deafnesss.