We have a boss cow we call "Popeye" because her eyes are not set deep, they stand out much like a mouse's eye.
She does not allow dogs to enter the pasture and keeps the other cows in line.
She also tries to keep me in line. I always carry a hickory stick walking through the pasture. When she is close, eyeballing me, I walk fast at her and throw something. If she paws, I do the same and charge at her first. Since then she has charged at me (cowardly manner) and I start at her throwing tree limbs. She runs away.
Anytime I am going to walk the pasture, I make sure that I walk toward her to make her move out of my path just as she does the other cows.
She has figured I am the boss cow now, but I will never take my eyes off of her. She has not attempted to chase me since last winter.
She raises a good calf, and most of all, she doesn't allow packs of dogs around the calves. Neighbor's big dogs pack together being bored, and when a calf runs, they chase it and one wants to catch it. Once they catch it, they gang up to kill it.
Then the coyotes come to clean it up. The neighbor's dogs kill for fun, much like chasing cars.
If she were more vicious about running me down, then she would have to go. At this point, I value you her being overly protective to my advantage.
Chuckie