Yeah, that was the lazy answer. The more correct is, because grass contains stuff (mainly lignin, reminds me of this i found this morning) that’s hard to digest with a normal stomach. So cows & co. have multiple gastric … sections(? Mägen), the first of which contains microrganisms specialized in breaking apart lignin. The following gastrics are more the usual bio-chemical kind, to digest the microorganisms.
In short, eating grass needs a specialized process and you can’t eat anything else as main food source, (they do occasionally eat a chicken or critter).
Grass came later.
Not after chicken nuggies tho?
Yeah, that was the lazy answer. The more correct is, because grass contains stuff (mainly lignin, reminds me of this i found this morning) that’s hard to digest with a normal stomach. So cows & co. have multiple gastric … sections(? Mägen), the first of which contains microrganisms specialized in breaking apart lignin. The following gastrics are more the usual bio-chemical kind, to digest the microorganisms.
In short, eating grass needs a specialized process and you can’t eat anything else as main food source, (they do occasionally eat a chicken or critter).