Dachshund
While dachshunds could look like cute companions for children because of their small size, this hound was built for work. Their short stature and tenacity are quite useful for digging and tunneling to fight or even flush out badgers (which might be just as large as they are).
When it comes to children, some dachshunds simply lack the patience to put up with anything related to poking, prodding, or any other attempts to be picked up. They could even snap, growl, or bark at other children, to protect themselves. This, of course, unless they are taught how to behave from a very young age.