I should know the answer to this.
I grew up around cows. From our front yard in Monroeville, PA, we could see cattle from Kuehn's Dairy grazing on a hill side across the valley. One of the ways I paid for college was by working at Turner's Dairy, and of course there were lots of cows there as well.
So I really should know the answer to this question, and frankly it embarrasses me that I don't: Are the cows above dangerous?
Here's my problem. I fish a little stream that runs through the pasture where these cows graze. When they see me, several of them come running for me. I don't think they'd actually hurt me. They probably just want to be fed. But I'd rather not discover I'm wrong on this.
Take this cow for instance. It's a young bull. He made a bee line fore me as soon as he saw me. If I stand my ground (with an electric fence between us) he acts afraid. But the second I turn my back, he charges.
The problem is compounded by the fact that the best pool on the stream is just over a hill side that is just at the far edge of this picture. There is no fence around it. It definitely has some nice fish in it.
So... continue to avoid these cows, or just fish right through them?