as a former dairyman, can I offer this advice.
A bull is very sensitive in it’s nose/septum. Hence why they have nose rings, and the phrase “to lead a bull by its nose”. SO next time a bull is being aggressive, with its head down, drawing the ground, snorting etc, just amble up to him, bold as yerlike, and shove your fingers in his nostrils, pinch his septum and he’ll be like putty in your hands.
How you let go of him safely however, I have no idea 😀
More sensibly….cows are luvverly. If theyre being a bit rowdy though, stand tall, take a step or two towards them and a few gibberish noises like thestabiliser says, will have you looking like a pro. And cows know not to mess about with pros.
Blue alkythene pipe to make them move
Worked on a dairy in taffland once where the herdsman took that approach. He was an arse. Herd was grumpy too. Tore my hands in the dairy with their kicking because he had them so badly tempered. Cows dont need their arse whipping.