Is that true? I know people who have raised cows for slaughter and I've not seen any "torturing" going on? Many people probably care for their livestock, I don't think it's an easy life honestly.
My friend is a veterinarian, who is a vegetarian, she's pretty honest about the meat industry and she told me that cows (at least in Australia) are almost never indoors or in factories during their life for various reasons, mostly just practical reasons and more often then not are left to roam around eating grass and feed. They don't have especially bad lives at all.
Yes in the end the animal is slaughtered for food, this sucks. On the other hand I've spent enough time fishing and hunting to realize that the "natural world" isn't very kind either.
Ever seen a a live fish have it's face slowly chewed off by a squid or octopus until it dies? A wounded animal get torn apart by a pack of wild dogs? A lamb dropped from the sky by an eagle so it dies after having it's bones shattered? It's super confronting.
I won't try to argue the savage aspect of nature means humans can do whatever we want, but to say that animals are being "tortured", I'm not quite sure about that.
Alan Watts gave a great talk on this subject and makes the argument that really, killing plants and fungus is also killing something or ruining another organisms home and morally questionable in it's own right, his argument is the best thing we can do is make the most of whatever we eat by cooking it beautifully and enjoying our meal giving it proper attention / appreciating it. I think he makes a pretty good point.