Telling a Horse's Age by its Teeth

Blessi is 15 years old.

You can roughly tell a horse’s age by its teeth.  Galvayne’s groove is a dark furrow or channel on the corner incisor.  It appears and grows at different ages of the horse:

- Appears at top of tooth around age 10
- Is halfway down tooth by age 15

- Extends completely down tooth by age 20

- Disappears from top half of tooth by age 25 but still shows on bottom half

- Is gone from tooth by age 30

Blessi is 24 years old

From: Mullen, G.  (2008).  Amazing Horse Facts and Trivia.  Chartwell Books, Inc., New York. (p.44)