Wrangler

[Kit]

A [wrangler] is a person who watches over and is a temporary [caretaker] for people who are not currently sober. Similar to a designated driver. [The wrangler] corrals the non-sober people to make sure they do not cause harm

[Sommer]

A person in charge of horses or other livestock on a ranch.

[Mary Mallozziberg]

someone who looks after horses or other animals on a ranch