It's not a matter of size, it's a matter of genetics/breed/temper, also education/training First, no males around children, regardless of the race and education, just to be sure. Female dogs are a different story, they don't have the same impulses, it's safer A female boxer isn't going to attack the kid, ever. However it will get between you and the kid if you scold him despite the fact that you're the parent, it's funny. That breed is a tad dumb but well-meaning, very protective