I have a 10-month-old breastfed baby who was also diagnosed with low iron at her 9 month doctor visit. What I learned is that the baby gets iron from the breastmilk for about 6 months and then it runs out somehow. That I don't understand.
I had been giving her Enfamil PolyViSol every so often for the Vitamin D but was not very diligent. If you read that label , you will find that it does NOT contain iron. You will need to go to the pharmacy and get Ferrous Sulfate Drops (ask the pharmacist). They are over the counter and do not need a prescription. And they cost about $4.00. My baby hates the taste. She gets one dropper with breakfast. We are going in for the follow-up blood test this week.
Get the drops. Once your baby's diet include more iron from meats, etc. you probably won't have to worry about it. Good luck!