When I got my second yorkie we had the same issues,it didnt take a week and all was solved, my openion is that there is a break in period where alpha is solved, in my case it was the smaller second dog that came out alpha,they have been togeather for 8 months and they will still see who is boss, they have never hurt each other,just teeth and noise of groweling and snapping,yet never a tooth connected,it just takes a little time...good luch |