Kelpies and border collies have about the same drive. The only difference I see with them is the kelpies do better with the heat. Spud did irriversable ligament damage, and it took alot of disscussion with multiple vets on what to do. Once a ligament is torn, its never as strong as it was and can keep happening. Ligament surgery recovery involves 8wks restricted to small area (think 1metre square) and 6months before able to work again. For Spud, he would have went mad. He has way too much drive. So amputate was the next option and if anything he's even faster then he was before. Recovery was only 6weeks. He amazed the vets. It's like he's only had 3 legs his whole life.