So very sorry for your loss.
In my humble opinion God gave us humans these critters for a purpose. It is up to us to try to understand it all as to why and how it affects our lives in such a profound manner. I firmly believe these animals that God gifted us with, make us better humans than we would be if they never came into our lives.
Has anyone ever experienced how much healing a horse can do for a "wounded warrior"? It is real.