I hunt my labs on Prairie Chickens before the pheasant season starts and have no problem, although my labs are "Pointing Labs" I bet less then 50% of the birds held, the others flushed just like pheasants. The great thing about Grouse is where they land is where they'll stay, I always have a good pare of bionics and watch where the covey lands, You can usually get a couple chances. Good luck!