Iron can help people "pump up" but, it can cause some major concerns for our pets. Make sure to keep nutritional supplements behind closed cabinets and out of reach. Throw away package inserts from dehydrated foods. Iron can cause the lining of the GI tract to breakdown and bleed or in severe cases, perforate. Keep some Milk of Magnesia on hand and give it right away if you think your pet has eaten iron. You can also offer eggs, water, and milk to help absorb the excess mineral. Seek veterinary help immediately if swallowed.