After years of setters, and trialing, I would say that the " all age" setter is where you find him! You get a lot of useful hunting dogs of all lines in the breed, you get some shooting dogs along the way, and very few "all age" dogs. All age pointer hit the road and expect you to find them! Setters seem to have an ability to get way out there, and find their way on course, or in a hunting situation. some of those big runners, adjust their range if you leave the horse at home! If you expect that as the goal, (and a lot don't), you have to breed the ones that can do it, even then they will drop a lot of good hunting dogs, foot trialing dogs, and horseback shooting dogs, for one or two who run for three hours at the brink, and finding, and holding birds. A lot of big runners are "covey" dogs, don't stick around to find singles, most are not retrievers, (they were not encouraged). Back in the day, we had single's dog who cleaned up and was very seldom out of range, usually an experienced bitch. Pheasants and all-age dogs are mutually exclusive, they hold them as long as they can, but probably not till you can find them without a mounted scout! Wild heavily pressured quail can be the same! By the way, if you read the report of the "all age" trials, you will see the line, "lost from judgment, at 1:31" in a three hour trial! I assume you get the drift. They do have mounted scouts who try to keep them on the course.They use tracking collars, that after judgment ceases, so they can find them. Giddy-up! It's a thrill to see a jam up performance. By the way, a setter won the last two National Championships. Happens in February. Coat is an issue, most of the running dogs have a thinner coat and are lighter weight and on their feet. Trimming is probably mandatory, even the AKC show champs are trimmed when they are in the field, forgoing any benched or conformation shows.