Regarding Rusty, I second the recommendation of "Culture Clash" by Jean Donaldson, and the avoidance of anything at all recommended by that Cesar person. I'm not a professional, but I've learned from my own rescue dogs and some very skilled professional people.

My fear aggressive dogs improved a lot with positive training techniques and some desensitization. I also recommend clicker training, and a few sessions with a good positive trainer or behaviorist (someone with legitimate credentials).

BTW, I don't have children or other pets, so that's a whole separate issue I'm not qualified to address.

Pam