While funny, it's actually not easy to verify the quality of manure.

> Animal manures are a valuable source of nutrients for crop growth. But, since every farm operation is different, each manure will have unique characteristics. Make regular laboratory manure analysis an important step in your manure and nutrient management planning. Understand that the total nutrient content in manure is not available the first year and that some nutrients may be lost depending on management practices.

https://extension.umn.edu/manure-land-application/manure-cha...

let's not be so down on cow manure. Sure in small quantities cow manure is an inconvenience you wipe off your shoe. But in very, very large quantities it's an extremely useful argricultural material you can build a business around. (fertilizer)

There is a web service that sends animal manure to people if you would like to use it as a medium of exchange.

oh man, step away from stuff you don't understand before you get lectured to death...

never mind, I see others have already proceeded to do that.