Is there any upside to industrialized livestock farming? E.g. the enormous number of animals that get to live?
Do you think quality of life matters? Or is mere existence enough? If so, do you think factory farmed animals have a good of quality life?
Avoid chicken (other domestic fowl are generally ok) and pigs, which can be (and are) tortured their whole lives for profit. There is considerable room for improvement in how veal is raised as part of milk and meat production, but calves which avoid that process and end up as meat get: two good years, a couple not-great months, and one really terrifying and shitty day.