They might, in less reputable farms, be kept pregnant so they can produce milk for longer. I'll admit, that's pretty god damned fucked up, but...well, ya see, I like cheese. And don't give me that "vegan cheese" bullshit. All the vegan cheese (and, indeed, most vegan substitute products) looks totally inedible. I know that looks don't account for taste, and something can look terrible and be great, but I just can't bring myself to eat something that looks like something tasty that had the lifeblood sucked out of it by some horrid flavour vampire.