Dogs can eat parsnips safely if they are cooked, plain, and served in moderation. Raw parsnips are not toxic but can be tough to digest and might pose a choking hazard, so cooking them makes them easier and safer for dogs to eat. Parsnips provide dogs with beneficial nutrients such as vitamins C and K, B vitamins, potassium, magnesium, fiber, and antioxidants. However, it's important to avoid seasoning or adding spices, butter, or sauces that can upset their digestion or be harmful. Parsnips should be given as an occasional treat or supplement to a balanced diet, not as a replacement for regular dog food.