Rocky is 13 weeks and he has started to get really rough with growling, barking and then lunging in to bite. From what I have read on here so far this seems to be normal behaviour. How much longer is this going to last or is it something that we have to break him from. He is biting our 4 year old too much and nothing seems to deter him from this. No redirecting it is like he is focused to the point where he doesn;t even hear you. I just want an idea how much longer we can expect him to be biting at us. Any one?