[Like people - cattle can vary in temperament]
When my daughters were in 4-H, the kids were still actually raising and caring for the animals themselves, every day. Buying a calf and hand raising it would make it much more tame.
As you say, any animal can be mean if they have a mind to.
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You have to be mucho firm training young cattle
Regular feeding times and a schedule are key
Skip training for a bit and they can get independent
Show cattle are kind of like circus elephants
They can ruin your day or your life
Much like people in Chicago or in DC