Cats can eat cabbage, but only in moderation and it should be cooked without any seasonings, oils, or butter. Cabbage is not toxic to cats, and it contains vitamins and minerals that could be beneficial in small amounts, but cats are obligate carnivores and do not need vegetables as a primary part of their diet. Feeding too much cabbage can cause digestive issues like gas, bloating, or diarrhea due to its high fiber content. Raw cabbage is harder for cats to digest, so it is better to serve it cooked. Additionally, some seasonings commonly paired with cabbage, like garlic and onion, are toxic to cats and should be avoided. If introducing cabbage, it is best to consult a veterinarian first and observe the cat for any adverse reactions.