Hi we are thinking about getting another dog due to the increase in violence in Perth lately. However we have young kids (3 & 5 yrs) so need a suitable breed. We have a kelpie however he hardly barks at anyone and is really submissive. We live on acreage so the dog would have heaps space and young kelpie to play with! Any suggestions on dog breeds? Or will my kelpie get a more protective nature as he gets older? He is currently 3 years old.