Our dog is 20 months old. Everytime he needs to go outside he blasts out of the door barking, 2 or 3 barks and then he settles down to sniff. I don't know how to stop him doing it or if it's just a normal/acceptable behaviour and to leave him alone. I'm just concerned it might be annoying the neighbours. He does bark at other times in the garden but we bring him straight in.