Dog bark The neighbours on the fourth floor have a white dog, they call it Little White. Sometimes when I return home, the owner is walking the dog, and it often barks to me. Every time the owner says to it:"why do you bark again, he is my neighbour, don't you know him?" I feel it is pretty weird, some people think that a dog barks means it is not friendly to you. However, a dog cannot speak human languages, it can only bark to express its emotion. Maybe Little White just wants to say "hello" to me.