I'm gonna third and fourth the advancement of the FACT that it's not the size of the dog, it's the fact that it's aggressive. Biggest problem with folks who talk about "aggressive dogs" is they have no clue about canine behavior or how to read it. Lots of folks think they know what their dog is saying to them. The vast majority of those folks are just flat wrong. It's a good thing for us humans that dogs are as forgiving as they are.
It's not that people can read dogs all that well. Dogs, however, are masters at reading humans.
It's not that people can read dogs all that well. Dogs, however, are masters at reading humans.