Earlier quoted context omitted.
> though I eat a lot of eggs and some dairy still. See, I feel like this just erodes from your argument. There’s not necessarily any trauma at all to the chickens or the cows involved in the production of eggs or milk. Trying to group that with the consumption of meat feels just very irrational.
Yes there is. Egg farms grind male chicks alive. They burn off the tip of the hens beak without anesthesia (which we know is high in nerves) so they don’t fight each other in captivity; which they don’t do nearly as much in nature because surprise surprise they’re not as stressed. Hens laying eggs every single day of their lives (because they’re taken away daily) live much much shorter lives and develop physiological…
Casein is not the acid in animals' stomachs. Caseins are one group of proteins in milk, and the main component of cheese.
You're probably thinking of rennet, the enzymes in animals' stomachs that help them digest their milk.
Rennet is used to coagulate milk to make cheese, but in modern cheesmaking practice the vast majority of it is produced by bacterial or fungal fermentation. Rennet taken from the stomachs of young ruminants is used only by a minority of "artisanal" or traditional producers.
Since you got this one completely wrong, is there a chance that the rest of the information in your comment is also slightly off, do you think? Would you find it very hard to re-examine the source of what you know about animal agriculture and try to find out how much of it is really true?