Mouthiness. Dachshunds have a higher than average tendency to nip, chew, play-bite, or herd people. Staffordshire Bull Terriers have lower than average tendency to nip, chew, play-bite, or herd people. Labrador Retrievers have a strong tendency to nip, chew, play-bite, or herd people. Impulse to Wander or Roam.