The Chihuahua is the smallest breed of dog and is named after the state of Chihuahua in Mexico. Chihuahuas exhibit varied morphology in their small size (1-12 lbs), including skull shape, coat length and coloration. Most Chihuahuas are born with a "molera," an incompletely fused cranium (called a fontanelle in humans), which presents no health problems.
- Naturally missing and worn teeth
- Exhibits signs of dental disease
- Skull Length 11 cm (4.3 in.)
- Skull Width 7.1 cm (2.8 in.)
- Skull Height 5.6 cm (2.2 in.)