halterbroken

/ˈhɔltərˌbroʊkən/
adjective
  1. Trained to accept a halter and lead, used especially of a horse or other large animal.
    • A halterbroken llama is much easier to transport to shows.
    • The halterbroken pony stood calmly while the child put on the lead rope.
    • They advertised the goat as halterbroken and good with children.