While we can't be sure to of the preferences of livestock, we can make pretty good guesses. If the responses of animals in a factory farm are more similar to t

While we can't be sure to of the preferences of livestock, we can make pretty good guesses. If the responses of animals in a factory farm are more similar to the responses of an animal that is being injured than an animal that is not being interacted with, then the posterior probability of the factory farm situation being dis-preferred by the animal is reasonably high. Factory farming or "wild" existence is a false dichotomy. There is the option of having pastured animals. And, critically, there is the option of not existing at all. Furthermore, I'd suggest that domesticated animals are different enough from their wild forebears that spending their existence being chased by predators isn't the default "non-factory farm" option. From what I know of factory farms, pastured animal husbandry, and the probable preference functions of animals, I would guess the preferences would be: pasturing > non-existence > factory farm largely from The Omnivore's Dilemma, by Michael Pollan