Nikki has aggressive problems, too. We think she was abused by a male earlier in her life because she does not like men at all when she first meets them. She also does not get along with other dogs when she is leashed. When she is off leash, she is fine. I wish that she was better with men, because most of the time she ends up doing what Simba did on the beach. I have confidence that she would never actually bite anyone, but I am cautious anyway. I guess the horrors in her past are too hard for her to forget them. She loves a lot of guys, but it takes a little while before she learns to trust them. On the bright side, she loves women and children (and cats!) so at least she doesnt bark at everyone.