Aged horse

Aged horse
An older horse. Originally referred to a horse with a "smooth mouth,"
generally eight years old or older,but modern use varies. Term may
refer to an animal seven years old or older eight or oldernine or
older, or ten or older. In horse racing and in some horse shows, an
aged horse is one over 4 years In some contexts, an aged horse is
older than 16 to 20 years of age.