I look forward to the answers of other folks because she plays just like my 9 month old, Barley. He does this constantly with my 13 1/2 year old lab who sometimes is game and sometimes is not and then I try to redirect. I have a friend who has a five year old female dalmation mix and she is dominate over Barley and does not tolerate his behavior yet he is one of the few dogs she will play with. I do often think that they sort of work it out among themselves but I really understand your predicament as Barley seems to roughshod over almost every single dog he meets and it is hard for me to tell when to get him to back off. I don't ever really think of him as a bully, however. Just a super over eager dorky puppy.