The Border Collie is of medium size. Its weight can vary from 14 to 22 kilograms. The excessive activity of the animal is due to the fact that the dog was bred specifically for long-term sheep grazing in the difficult conditions of the hilly regions of Scotland and England. A dog can walk up to 80 kilometers a day, and sometimes even more! If you are looking for a good working dog, then you simply cannot find a better Border Collie!