[fredrikholm]

Is there any data on that?

I meet quite a bit of animal-activist types (by association) that 'expose' parts of the meat industry by taking jobs and secretly filming (as it's often illegal to do).

Most of the extreme horrors they've recorded are in slaughterhouses, but I have vivid memories of seeing cattle confined in small cages which fecal infected infections. Perhaps that's dairy production, as it doesn't affect the outcome (as much)?