Argh! Theres been a group of kids running up and down the lane at the back of my house, dog is in garden and every time they are passing they're banging on fence and 'barking' at dog which sets him off. When I say every it's happened about 4 times now, but am not sure how many times I should suck it up before I shout through the fence to stop it or should I have done this the 2nd time, or bring him in? First dog here so not sure if there is 'ruling/etiquette' around things like this!