Bob was the "pup" when we got him. He quickly grew and became more and more dominant. He is always bumping or backing his rear end into Ginger just to bother her. Sometimes, most of he time Ginger tolerates it, but occasionally she snaps out and the all "H" breaks loose. Sorry... but it seems like nothing has improved it - even with all the disciplining and "no.no" that we do. While not improving, it has lessened.