Alot of people don't look at it this way.Honestly what the grandparents are doing have no holding whatsoever on wether you should breed or not. Unless they themselves have the ribbons and the trial titles etc they aren't breeding stock. Good genes help in making that leap easier, but breeding quality is dependent on they themselves getting these achievements.
We bought our Irish Setter from a breeder who didn't show and since her husband died, didn't field trial the dogs. The lineage of her dogs was almost solid field trial champians for generations, imported from Ireland and England mostly, but the parents were not titled. They were used for recreational hunting only.
We had to board our pup occasionally, and we were lucky to have a local breeder/trainer of a different hunting breed who also boarded dogs. He wanted to field trial our pup so bad as the natural instincts were there and we were told he probably would have taken titles easily. We just weren't up to the time requirements of this lifestyle.
That being said, we didn't buy our pup for show or for field trials. He was a pet and loved to go bird hunting with us. Some of his siblings went on to win filed trials and she had repeat buyers for her pups that regularly used them for this. So a skip in a generation for field trial and showing titles does not mean the pups are worthless.