I hunted in Northumberland and the Scottish borders mainly, so hving dogs that jumped are a necesity, not jumping no hares we used to say...I always start mine 8weeks onwards, just step over hieghts at this age, six to eight inches so that the pup is already learning about obsticles at this young age, as the pup gets older, so the hieght is raised, then varied obsticles, I also always blend retrieving training into early jumping training, the dog will enjoy both and youe teaching two things at the same time, I start this off with fur dummies, balls, and progress later onto rabbit carcases (but