[Moses]

I saw Victoria talk about this on It's me or the Dog, she also said it was the food that the dog was eating. The are not getting the nutrients they need. If I remember she changed the food and also this particular dog was engulfing his food which was another sign of malnutrition due to the cheap food.
So she actually would only let the dog eat a litte food at a time so he would eat slower. After the new food and technique was introduced the dog was no longer interested in eating his feces.