Read about using one person on each side of animal w/ attached lead ropes. No rope halters.
Definitely start in a more confined area and work your way to more open spaces.
I wonder about trying a sort of hobble setup if the above aren’t options.. …. Just to make running off more difficult for your cow.
FYI – there’s an older book called Handbook of Livestock Handling and Restraint. Some good there too.
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