Why is manure stinky?

Answer 1

Well, it is actually kind of strange, because if you are talking about horse manure, horses mainly eat grass and grass isn't stinky. But then again, who knows what else horses may eat? I guess when grass is mushed up inside their body it will change it's odour?! Why did you want to know anyway? Do you have BO?

Answer 2

Their farts are big because they are big. Gas=stinky

Answer 3

Often, yes.