Owned cows, Raoul.
And they are no threat. Except, if you're petting one, or making sure it's feeding a bummer calf, then there can be a problem.
If one steps on your foot, there is a 50 - 50 chance it will put it's weight on that foot when it takes off. And I don't know of anything which can influence that. Ya got one chance in 2 your foot is going to be sore.
And, another thing to remember. Cows kick forward, to protect their udders from strange calves. Horses kick backward, and we're used to thinking of that.
There is nothing to fear from being behind a cow, at least in the kick department, but be damned careful alongside one.
Arf