Cows can produce 50-140lb. of manure per day! That's a lot of free, very valuable fertilizer. At the same time that much manure can quickly become a problem if not managed well. That's part of the reason our cows are rotated on pasture daily; so the manure is spread evenly across the ground where grass can reap the benefits. In the winter when the cows aren't on pasture we provide lots of bedding material, usually in the form of straw and junk hay to soak up all that manure so we can compost it and then spread it on our fields in the summer when the grass can make best use of the nutrients.
This little guy probably didn't appreciate having fertilizer deposited on his head though.