Thirty Horses

Riddle: Thirty white horses on a red hill, First they champ, then they stamp, Then they stand still. What are the horses?

Answer: Teeth.

Source: https://www.riddles.com/index.php/4530

Thirty white horses on a red hill, First they champ, then they stamp, Then they stand still. What are the horses? — Thirty horses by Xela v1.

Riddle: Thirty white horses on a red hill, First they champ, then they stamp, Then they stand still. What are the horses? Answer: Teeth. — by Xela v2.