She was very obviously unhappy about the situation - she was halter trained but she'd just calved hours ago and then had a "pecking order" fight with the other cow she lived with - and I was walking her along with a very no-nonsense farmer shouting "Stand back! SIT. DOON." at everyone.
Folk wanting to bring their kids to pet them over the fence, or even ignoring the signs and going into the field with them, was a problem in general though. They came from a breeder who used to do an air bnb "hairy coo experience" thing where guests could help feed and groom them, so they were well used to people. The bigger danger was that one of them would toss her head if you weren't combing or scratching hard enough or in the right place - that could be lethal if you weren't expecting it!
The shows are a big thing here though, so I think a lot of folk probably have a few of their animals halter trained.
(I can't think of the words I mean for "pecking order" for cows)
Cow tax:
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