first of all, walking around with an gun/pistol in the netherlands is not allowd even an fake gun is illegal. the man who shoot the bird is from an special company, the domino organisation called the company after they spotted the bird then the man came with the gun and shot the bird. also there are protection measures at the place where the domino stone are. for example there are double doors. so if 1 of the doors is open the other is closed. i think its good that the shot the bird, becuase it was impossible to catch the bird. if they would not have shot the bird he would have still been flying around and he would have knocked all the domino stones.