Letting your cat munch on small bits of this leafy-green has many added benefits. First of all, spinach is full of iron that promotes the production of red blood cells. Second, spinach also contains fibre, calcium and potassium. Lastly, this superfood is chocked full of flavonoids and carotenoids that are known to help fight inflammation and cancer. In addition, if you have a cat that tends to eat grass, letting her experience spinach may also keep her from grazing on your lawn.