Is it still anecdotal if literally any farmer will tell you the same? Because they will.
A surprisingly large amount of effort goes into trying to keep the livestock from hurting themselves or getting themselves killed. That's inevitable when essentially turn off natural selection, they end up losing any sense of self preservation. And why not, they do have multiple humans who's entire career centers on keeping them alive until they're ready for slaughter.
Shit, I remember these in school. And I'm 22, pretty sure early 20s isn't ood enough to count for an "are you this old" meme.