They were not bred for upland hunting but retrieving. Thus they are retrievers, yes they can hunt upland but not the same distance or time afield as a shorthair. GSP'S were bred for BOTH. Unfortunately some have more field trial in them do to breeding. Not so much bad, if it does not remove what was bred in the first place. Again the breed was bred for not only upland and waterfowl, but protection, keeping varmints from getting farm animals, along with tracking big game. If you do not think they are big bones or lacking, speed and endurance just look at all other hunting breeds. You will see none of them running skijoring, and winning. They are brutes, smart and close members of the family.