The Dalmatian is a breed of large-sized dog, noted for its unique white coat marked with black or liver-coloured spots and used mainly as a carriage dog in its early days. The origins of the breed can be traced back to Croatia and its historical region of Dalmatia. Today, it is a popular family pet and many dog enthusiasts enter Dalmatians into kennel club competitions. Dalmatian puppies are born with plain white coats and their first spots usually appear within 10 days; however, spots are visible on their skin from birth. They continue to develop until the dog is around 18 months old. Spots usually range in size from 20 to 60 mm (1.25 to 2.5 in), and are most commonly black or liver on a white background. Liver is the recessive color in dalmatians, meaning that both parents have to “carry” liver in order to produce liver pups. If both parents are liver, then all puppies will be liver spotted.