User blog comment:Loney 97/tfw all the people you know are gorgeous/@comment-5111283-20150622022450/@comment-26479618-20150622042356

When cows die, bacteria and fungi break down their bodies and decomposition occurs. It recycles the compounds that make up dead organisms back to the soil. The plants then draw out those compounds with their roots and use them to grow.

So any blade of grass could have once been part of a cow, and any cow could be a potential cannibal.