I am taking Dawn to obedience as soon as she is out of heat. Since my hubby won't go, I'm handling her, which the trainer and I both think might be best at first. Dawn attacks Fiona the most, but she has also tried her crap with Cheyenne and Rascal. So I feel, and trainer agrees, that she needs an experienced handler on her until we get her under control. At home, because I don't want my sons in the middle of a aggressive dog situation, and my hubby is no help at all, there is no way I can work her with the dogs she has a problem with safely. Also, a dog in heat is hormonal just like a girl having PMS, only worse. Think about how grouchy women get once a month, dogs get that way twice a year. Dawn only goes into heat once a year because of the Texas heat, same with other Siberians down here. I am working on Dawn alone, away from any other dogs, at these times she readily sits, downs, etc. so she still knows I'm the boss and need to be obeyed. She will even obey both my sons when she is out and alone, which is great.