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.
- Shows signs of periodontal disease
- Skull displays fontanelles characteristic of chihuahuas
- Skull Length 9.4cm (3.7in)
- Skull Width 6.7cm (2.6in)
- Skull Height 5.7cm (2.2in)