This is something that you should discuss with your baby's pediatrician as there may be a medical need for iron fortified cereals and / or iron supplements. (wholesomebabyfood.momtastic.com)
Some experts say that the iron stores of a breast fed baby are NOT necessarily deficient by 6 months of age and that the introduction of iron fortified cereal can lead to baby absorbing LESS iron from breast milk. (homemade-baby-food-recipes.com)
A nurse at the Well Baby Clinic said I should follow her cues — which I was doing, except to ensure she is getting enough iron (i.e. iron fortified cereal)... but she is definitely not getting enough iron! (thebadassbreastfeeder.com)