Min Pin or Chihuahua? Because of their similar size and sometimes similar coat color, MIniature Pinschers are often mistaken for Chihuahuas. However, Miniature Pinschers are very different than Chihuahuas. The Chihuahua breed is an ancient breed (circa 5th century A.D.) from Mexico and South America while the Miniature Pinscher originated half-way across the world …