Nothing like passing on the sport to your kids and grandkids,good looking dogs and grandson there ducker.I have a black and a yellow lab similar to rose and duke but never worked them on birds much as I'm not much of a duck hunter,they are huntin' fools around the farm though and will retrieve.
I have about 50 Canada Geese fly over the house every evening about the edge of dark,might have to try it in season.
Good Luck,
Glenn P.