B12 doesn't originate in animals. Bacteria and yeasts are not animals and the B12 in meat is only there as the animals either eat feed with microbes on it, or are given supplements themselves.What is it with these nutters ?
Look I don't care how adults choose to fuel their body, they're big enough and ugly enough to decide for themselves.
If they realise they need to take Vit B12 supplements to live that's fine. If they can convince themselves that these supplements don't come from animals so they can pretend they only eat veggies, then that's cracking.
When they withhold aminos from growing children because of their own bigoted* views it becomes child neglect at best, if not downright abuse.
But, and this seems to be part of the gig with many of the trendies, (stand fast @Dwarf,) WTF is it with the names ?
The lunatic neighbour in your link calling her daughter "River" - perhaps to remind her of the batter that ran down her buttock ?
FFS weirdos, do what you will to yourselves but please leave children out of your fantasies.
* See, their favourite word does work both ways.
I get mine from Meridian Yeast extract.