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An 18 month old toddler is brought in for decreased energy and “not acting right.” On exam, the child is noted to be pale, mildly tachypneic, and has a flow murmur. She is afebrile. Her point of care hemoglobin is 3.2 g/dL, and additional history reveals that she is a very picky eater and drinks five 8-oz bottles of milk per day and takes in little else. A full CBC and iron studies are sent to the lab.