I had never heard of grass jelly, but I see that it isn’t made from grass.
even worse is the giant panda. here’s a carnivore which eats almost nothing but bamboo shoots. they spend so much time lazing around eating 30 lbs of food a day (and shitting ~40 times a day) they don’t even have the energy to bother with that whole reproduction thing.
Half of a cow’s protine needs are met by the cow digesting it’s own gut microorganisms, like an internal ranch where it’s raising creatures for slaughter.