Seriously: Moo at them 😀
I do. I have fookin’ conversations with cows while mooing back and forth across a field. They moo back, I moo some more and before you know it, we’re friends. IME cows a amazingly inquisitive, but easily scared.
This paradoxical combination tends to make them a bit skittish. They want to get to know you, but are quite scared of you at the same time. But if you learn to read their body language and match yours to theirs (head nodding works well), you can get along just fine. I’ve had whole herds of cows running across fields to say hello. Like, totally running at me. Thirty cows.
They simply aren’t being aggressive, just excitable, as only a group of half-tonne quadrupeds can be. Never once have I been in danger, as they tend to stop rather rapidly once they get within 2 metres or so.
Loud noises, such as hand claps, work well to make them stop if you need to.
Source: 20 years of cow-whispering