I have heard that a pasture is healthiest when there are lots of vegetarian animals grazing and pooping on the land. The poop and urine are perfect for soil enrichment. Vegetarian animals, not dogs or humans.
According to some ‘garden experts’ peeing on your garden, or on your landscape trees and shrubs is the BEST thing you can do. (Pure Nitrogen, Baby!)
I’m not going THAT far; my Mule makes loads of lovely compost for me. :)