I think this is 2 part question, so I'll offer my 2 answers. As a lifelong grousehunter, I've been blessed with several very good grouse dogs, but back 30 years ago, the bird numbers and habitat in our area were pretty darn good, as hunters, we're lucky to walk behind our own dogs for many days and years, thus we see them handle birds often, and under different conditions. So, we've all seen our dogs do " great" things.

2nd part, is coverdog trials, I've been lucky to have witnessed, up close, many good performances, from Sanderlings Clover Rail, and A Rolling Stone, each having 6 grouse, Quail Trap Sadie, having 1 bird, in several different venues, Springfield Judge having 9, that's NOT a typo, his bracemate, Blue Streak, with 6,Titanium Hammer, Ponderosa Mac, both having multiple grouse in one trial, and solo birds in others.Panola Bacon, Little Boy Butch, and most recently Springbrook Maximus. I'm sure I've missed some, but those were some really memorable performances.