A Blink Dog is a dog that can teleport short distances, hence the name. It first appeared in first edition. It then appeared in the 3.0e and 3.5e MM1, where it was given a level adjustment for use as a player character race despite not speaking any languages and not having hands with which to grab things. Still a better player character race than the Ixitxachitl or Glimmerskin, though. They are also stated to really hate Displacer Beasts.