This is partly explained in my picture. The females are artificially inseminated (raped) by humans. Bull Farmers collect bull semen by literally jacking them off… Then they sell it off to other farmers so they can use it to impregnate the female cows by putting a gloved arm up their anus and sticking a rod with the semen at the end into their cervix. Raising every single male that is born is not profitable to the industry. That is why they are killed if they can’t sell them immediately for extra cash.