Cats can eat grapefruit pulp, but in moderation. Grapefruit pulp is rich in water, vitamins, trace elements, and minerals, which can supplement the nutrients cats need and improve their immunity. However, grapefruit is an acidic food, and eating too much may irritate a cat's stomach and intestines, leading to symptoms such as vomiting and diarrhea.

Therefore, cat owners should control the amount of food they feed their cats and avoid overfeeding. Furthermore, a cat's diet should primarily consist of cat food, with fruits such as grapefruit pulp only given in moderation as supplementary food.