Hi, I'm so sorry this happened to Allie, and I hope she feels better soon, and she doesn't lose anymore teeth. Don't blame yourself for what happened, you didn't want her to be alone. Did your mom not separate them in different parts of the house, or did they get together by accident? Do they always fight when they are together? I would just let her be at home when you have to work late, most bullies will sleep when they are home alone. Maybe you could get a dog walker to come in on your late nights and take her for a potty break, and keep her company for a 1/2 hour or so.