I don't know if you are breastfeeding, shoobaloo, but I know that a lot of breastfeeding mums are frightened into worrying about iron by their health visitors around this age. Contrary to what you may have been told, breastmilk has plenty of iron in and is perfectly absorbed by your baby. The reason that formula has so much more iron in it is because it is a lot harder for the body to absorb iron from other sources.
\link{http://www.kellymom.com/nutrition/vitamins/iron.html\Kellymom} as always, has good info on this