ISDS Timeline
| July 1906 | The International Sheep Dog Society was Formed by sheepmen of the Scottish Borders, meeting at Haddington in East Lothian |
| July 1906 |
Society Chairman George Clark of Eaglescairnie Mains Society Secretary James Wilson of Lauder Place, East Linton |
| August 1906 | The first ever trials known as 'International' were held at Gullane Hill in East Lothian. Dogs allowed to compete had to be qualified, and was confined to dogs which had won a prize or commendation at a local trial, a rule that was subsequently abandoned |
| 1922 | Welsh handlers competed for the first time at 'International' trials |
| 1961 | Irish handlers competed for the first time at 'International' trials |
| 1973 | The ISDS returned to Bala, Wales, for the International trial to mark the centenary of the first trials ever held |
| 1982 | International Trial qualification rule re-considered following ever-increasing entries at the Nationals got out of hand |
