Dogs can eat black beans, but they must be cooked properly and fed in moderation. Black beans provide protein, fiber, and essential nutrients that can benefit dogs, but they should never be given raw, as raw beans are toxic to dogs. It's important to introduce black beans gradually to avoid digestive upset like gas, bloating, vomiting, or diarrhea. Feeding black beans in small portions—no more than 10% of the dog's daily intake—and without any seasoning is recommended. Also, avoid canned black beans due to high salt and preservatives. If the dog has any legume allergies or sensitivities, consult a veterinarian before feeding them black beans.