I see. So we only get it in meat now, which means dog food is full of it so they have to eat yogurt to replenish their gut bacteria, and their stool kills the bacteria in our soil?
"Their stool kills bacteria".
How do you know this?
Have you examined the soil under a microscope?
For human gut health, bananas are a very beneficial food,
because the large chain sugars get beyond the stomach into the intestines.
Perhaps you could trial them on dogs.
http://www.naturalnews.com/031828_bananas_digestion.html