Just to say to Grannybags, I think it was, that grouse are not bred specially for shooting, they are naturally wild birds. I think you're thinking of pheasant which are specially bred for the sport.
Each to their own of course but unless you're a vegetarian please leave the shooting fraternity alone. Game has a better life than most farmed meat and it certainly has a better death than any animal that meets its end in an abattoir, especially one which performs any kind of ritual slaughter which is currently used for approximately 90% of poultry, 60+% of lamb and 30+% of beef slaughtered in the UK.
Game is also much leaner and better for you than farmed meat.