Dogs can safely eat bell peppers of all colors. Bell peppers are a low- calorie, nutrient-rich food that provides vitamins A, C, E, beta-carotene, antioxidants, and fiber, which can support a dog's health, including immune function, skin, coat, and eye health. Red bell peppers are considered the most nutritious variety due to their higher vitamin and antioxidant levels. It is best to serve bell peppers in moderation, with treats and human food making up no more than 10% of a dog's daily calorie intake. Small dogs can have a few small pieces, while larger dogs can have up to half a small bell pepper. Bell peppers should be prepared by removing seeds and stems and can be served raw in small pieces or lightly steamed without seasoning for easier digestion. Spicy peppers like jalapeƱos and chili peppers should be avoided as they contain capsaicin, which can upset a dog's digestive system and cause discomfort. If a dog shows signs of upset stomach, vomiting, or diarrhea after eating bell peppers, discontinue feeding and consult a veterinarian.