horses

[tania]

what is the term for a cowboys spare horse?

[IggyB]

A spare horse? as in extra, like spare time, or thin like crow bait, or frugal as in sparingly, or duplicate as in spare part, or a horse that is called in when the ten pin is left standing?

[Ewood27]

Ornery critter?

[woofgang]

remuda or cavvy, the herd of cowboys' spare horses

[Cetti]

Remuda - A term adopted to refer to the large herd of extra horses gathered for roundups or trail drives. Each cowboy had a string of six or cowponies for his use.

http://www.cartermuseum.org/collections/smith/glos
sary.php

woofgang beat me to it :-)

[woofgang]

what's interesting is how I got the answer, I just googled "cowboy's spare horse"