The ISDS website states, “The International Sheep Dog Society is a member organisation and registers over 6,000 Border Collie pups every year on behalf of its members. The ISDS Number and Dog Certificate are a guarantee of pedigree that, for most dogs, can be traced back over 100 years.” It organizes 5 national trials in the U.K. and Ireland and the World Sheepdog Trial (every 3rd year).