How to determine the name of a horse with a handful of dollars?

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Background setting

United States, 1899. When the police began to crack down on the gangs of the remaining fugitives, the wild west era ushered in the last dusk. Those who are unwilling to surrender or give in will only die. Arthur Morgan and Van der Linde and his gang had an unexpected robbery in Blackwater, and they had to flee this western town. Federal detectives and top bounty hunters in China are in hot pursuit, and Arthur and his party must plunder and struggle to survive in the hinterland of the vast wilderness of the United States. With the deepening contradictions and divisions within the gang, Arthur will face an inevitable choice: whether to choose his own ideal or to choose loyalty to the gang that raised him. The information comes from Baidu Encyclopedia.