[Houshalter]

That's not going to domesticate them. You need to put them into a fenced in area for long periods of time, and control the population. Selecting the ones that are the tamest around humans, and killing the ones that are the most aggressive or uncontrollable.

The indians could not have accomplished this (easily.)

[soperj]

Go on and tell me why they couldn't?

[Houshalter]

See the later half of this video: https://www.youtube.com/watch?v=JEYh5WACqEk Starting about 6:40.

[soperj]

It's not like the cows weren't domesticated from something similar to a bison (https://en.wikipedia.org/wiki/Aurochs). Bulls are still be very violent animals. That video also forgets alpacas.