I think they're talking about Lamb for example. They're just using very provocative language which muddies the waters to the point of being almost incoherent.
I don't personally disagree with the core message but berating people and hitting them over the head like that is just not the way to go about changing people's minds. For one thing it won't work.
Males usually. Chicks, lambs, bovine calves. Male piglets are a bit tricky, there's more interest in raising them to adulthood but they get castrated to not "taint the meat", and they're castrated as piglets (look up the videos when you have the time).