What happens if a dog eats rice long-term?

Long-term rice as staple causes these. First, rice is mostly carbs and less nutritious than meat and vegetables, so it causes imbalance and lack of protein, vitamins and minerals. Second, dogs have little amylase, so much rice causes indigestion, diarrhea or constipation.

Finally, long-term soft food harms oral health, causing loose, weak teeth and periodontal disease.