I agree with beatarmy-
I hunt ruffed grouse and they taste just fine. The strong taste that they can sometimes have is from whatever they are eating (whether it be pine seeds, sage seeds). Sometimes you can smell if the bird meat is going to be strong. If it does smell strong, I find it best to just breast the bird and remove the legs, and soak the meat in saltwater overnight. this tends to get rid of the game flavor.