Kinda sounds like a bad joke… but in Germany they do.
They are being lowered into a pit in masses and then stunned using CO2. In theory (and propagated as such) a rather “good way to go”, but they tend to suffer a fucking awfully long time, because well… they’re being suffocated alive with a lot of them in a small pit. So yea…
Completely ignoring that fucking crazy statement from the video:
Yes, it can contain meat. But you normally start somewhere at around 5months with only single types of veggies, so you can check allergies and also it’s easier for their digestion. I think you normally do not start any meat before 8 or 9 months.