The mouth of a colt at three years old.
The side view of the jaw of a three year old colt.
The side view of the jaw of a four year old colt.
The mouth of a colt at four years old.
The mouth of a colt at four and a half years old.
The mouth of a horse at five years of age.
The mouth of a horse at six years old.
The mouth of a horse at seven years old.
The mouth of a horse at eight years old.
The mouth of a horse at twenty years old.
The mouth of a horse at thirty years old.
