When the digestive tract is upset, vomiting and diarrhea may result. Since the causes of these symptoms are varied, it’s best to consult a veterinarian. Often, a gastrointestinal (GI) diet is recommended to support the digestive tract and ensure the gut gets the nutrients it needs to recover. A bland diet of cooked chicken and rice might be recommended, but it has several limitations and is not appropriate for long-term feeding.