Photographs: Sarah FarnsworthThere is a reason an invitation to shoot grouse is treasured above almost any other in the sporting calendar. Attending any shoot day is a privilege; attending a grouse day doubly so. Responding to a grouse shooting invitationIt starts, as these things always do, with the invitation. Grouse shooting safety: butts, flankers and the hornSafety is where grouse etiquette earns its keep, because here good manners and good sense are the same thing. The golden rules of grouse shooting etiquetteNone of this is really about rules.