Which preposition to use with bronchos

in Occurrences 2%

He heard Carolyn June talking to the bronchos in soft endearing tones.

into Occurrences 1%

Parker and the cowboys were just splashing their bronchos into the water at the lower ford.

to Occurrences 1%

It was nearly ten o'clock when Sing Pete stopped the grub-wagon at the bunk-house; Pedro wrangled the saddle cavallard into the pasture below the barn; Parker and the cowboys jogged their bronchos to the stable door and the Ramblin' Kid, riding the Gold Dust maverickCaptain

up Occurrences 1%

Chuck and Bert reined their bronchos up to Parker.

Which preposition to use with  bronchos