My Backyards Ecosystem

I have these little piles of dirt that are randomly scattered throughout the yard. On occasion, I'll see small throws of dirt sputtering out like an anemic waterfall from these mounds. Yes in deed, I do believe that I've got a mole. When we first noticed this, I was excited, much to my husbands chagrin. I am an animal lover and I have never in my life seen a mole. I was intrigued. My imagination pictured a fuzzy little hamster-like creature with no eyes and human-like hands living in our backyard, living in his natural habitat. And being the nice, tolerable people that we are we would not mess with Mother Nature and her animals. This resolution to not bother the mole in his habitat quickly absolved when he began digging up flowers and making bigger mole holes. I began rationalizing my annoyance with him in my head- "Who is paying for the mortgage on this house anyways?"
One night we had a few friends over in our backyard when we began discerning little sprays of dirt coming up form one of the mole holes. Frankie, my cat, quickly rushed over to the hole and stuck his nose in it. We were all cheering for him because we thought, of course, that he would capture and kill the mole. Are thoughts were wrong, because Frankie turned around, stuck his butt over the hole, and began to defecate right into the hole. Needless to say this didn't kill the mole, although it did give Frankie a new idea that the little mounds of dirt would be his new bathrooms.
A curious thing began to transpire with the mole's holes. We got a puppy, named him Gumbo, potty trained him, taught him how to walk on a leash and how to fetch a tennis ball, you know... puppy training 101. But we were never quite sure why when he would come in from the back yard he would smell like a horse. My attempt in figuring out what exactly a horse smelled like-so that I could pin down the smell-led me to the conclusion that a horse smells like feces, and our dog, therefore, smelled like sh$%! I couldn't find the source. I checked all four paws, his nose, his ears, his butt....I couldn't find anything.
The next day my husband and I were throwing the tennis ball to our dog and he would fetch. The last throw of the day landed in a hill of mole dirt. Gumbo ran towards the ball, stuck his nose in the dirt, and came up eating a cat turd. That was it for playing fetch. He could not be distracted from his tasty treat, and we could not pry the nasty waste matter out of his mouth. He was as happy as a puppy could be.
So it is what it is, and I can't do anything about it. The mole digs a hole, makes a heap of dirt, which the cat poops in, and the dog eats the poop. I wonder if the cycle ever completely revolves? Does the mole eat the dog poop and will the cat ever eat the mole? All I know is that I have no control over this situation. Mole traps, enticing my dog with real dog treats-nothing works. Ecology is a phenomenal science and I realize every living thing does its own thing to keep the world turning, but why does my dog eat poop? I LOVE LOVE LOVE my dog, but this really makes me question his animals instincts. Maybe his instincts are telling him to do it for the ecosystem; maybe it's his way of "recycling". I doubt it.