Coprophagia (Stool Eating) There are a few things are dogs do that we’re rather embarrassed to mention.  I think it’s safe to say Coprophagia (Stool Eating) would fall into that category. It’s important to come to understand why it occurs.  Here are some common reasons: The dog isn’t being fed enough. The dog is fed a very poor-quality food and is suffering from malnutrition or a vitamin/mineral deficiency. The dog has a medical problem.