A nurse in a pediatric clinic is talking with a parent of a toddler. The parent tells the nurse that her toddler drinks a quart of milk a day. The nurse should recognize that the toddler is at risk for which of the following disorders?

A. Beriberi: Incorrect. Caused by a deficiency in thiamine (Vitamin B1), not linked to high milk consumption. B. Dehydration: Incorrect. Milk intake can contribute to hydration, though it should not replace water. C. Diabetes mellitus: Incorrect. High milk consumption is not directly linked to diabetes in toddlers. D. Iron-deficiency anemia: Correct. Excessive milk can lead to iron-deficiency anemia because milk is low in iron and can interfere with iron absorption from other foods, leading to reduced iron intake.