Dogs should not eat pizza. Pizza often contains ingredients that are harmful or toxic to dogs, such as garlic, onions, high-fat cheese, and processed meats like pepperoni and sausage. These ingredients can cause digestive issues, including vomiting and diarrhea, and in some cases, lead to more serious conditions like pancreatitis or obesity. Even pizza crust is not recommended regularly because it may contain traces of harmful ingredients and lacks nutritional value for dogs. Raw pizza dough is especially dangerous due to yeast, which can expand in a dog's stomach and cause life-threatening bloating and alcohol poisoning. Therefore, it is safest to avoid feeding dogs pizza altogether and instead provide treats made specifically for their dietary needs.