A 10-month-old infant presents for a well-child visit. The c…

A 10-month-old infant presents for a well-child visit. The caregiver reports the baby has been increasingly irritable and pale over the past few weeks. Dietary history reveals exclusive consumption of cow’s milk and minimal solid food intake. Laboratory testing shows hemoglobin of 9.0 g/dL.  Based on this information, which intervention is most appropriate?