I have been watching Cesar Millan vids and carefully observing how he deals with aggressive dogs, which are his bread and butter. He loves the powerful breeds, and he likes to help aggressive dogs who are dangerous.
I've had mylo for 5 years now; she came as a two year old. She had been chained up a lot, she was filthy, she had just raised a litter of beautiful pups, and the owner had gotten married to a woman who had dogs of her own as well as kids, and they couldn't deal with Mylo's behaviors. I sort of pooh-poohed that when I got her, because she did so well with the kids (and her interaction with a 3 y.o. girl is what sold me on her). Over the years, I've come to realize exactly how severe her behaviors were and are; she just happens to have fairly good HUMAN skills, and is a smaller dog, so that sort of masks the fact that she's VERY aggressive, particularly towards strange dogs, but to a lesser extent against dogs she knows and even humans as well.
When we got Mylo, there were certain things we didn't do with her... Of course we never took her for walks; but we have a good sized fenced yard that she has the run of, as well as the run of the house, when we're there and when we aren't. She goes in and out as she pleases, she seldom gets out of the yard so that's not a problem. So we didn't HAVE to take her on walks, and it was easier not to, so we didn't have to really address her dog aggression.
She does go berserck when dogs walk by our house, and they do a half dozen times a day, as different people walk their dogs. Everybody knows that mylo will bark at them for as long as it takes them to come and go out of sight (up to 15 minutes!) but they choose our street anyway, so I can only assume that the dogs on the next street over are even worse, lol.
My mother can't come to my house with her dogs, because one of her dogs is a female poodle that is just as rabid about Mylo as Mylo is about her. They hate each other. And if I crate Mylo in the back (she has a lovely big crate) she barks without cessation. If she's in the crate for 30 hours, she'll bark for 30 hours. She's never been in the crate for 30 hours, believe me. I'd rather deal with the fight.
We couldn't really love on Mylo for the first couple of years we had her. She nipped my daughter in the face on multiple occasions, when my daughter would get her face too close. I didn't even pet her much because I really wasn't sure how she was going to react.
Over the last five years, I've very slowly worked to make her more relaxed...we can pick her up now. There was a time when that was risky. I did it anyway, but she didn't like it and she would nip. I can hold her muzzle now...that's the way dominant dogs show dominance with pups, they hold their muzzles in their mouths, and Mylo wasn't keen on it. I can hold her against me and kiss her face and so can the kids..these are things we couldn't do before, and though they sound like small things, they really weren't.
I'm used to dogs, I'm not intimidated by them, and i do assume a dominant role with them. But I don't antagonize aggressive dogs, either, and though I hadn't really labeled her as such officially, I recognized the aggression in Mylo and wanted to give her enough space that we weren't feeding into it. At the same time, giving them too much space also feeds into it, so we approached it slowly and we got our nips over time.
Now we have Klaus the saint pup, and it's time to move to the next level. I want Mylo to go camping and hiking with us. I want her to behave in a manner that I don't MIND if Klaus emulates it. He looks to her, and yet we have to make it so what he sees isn't complete crazy out of control behavior.
And that's a big change for poor old Mylo. I think she probably thought her learning days were over. NOPE!