Final answer:
The concern for a child with a decreased appetite for solids but high milk consumption is likely Iron deficiency anemia, due to a possible displacement of iron-rich foods in the diet and impaired iron absorption.
Step-by-step explanation:
The concern for a kid who has been weaned off formula to solids, but is displaying a decreased appetite for solids and is drinking 40oz of milk daily, is likely to be Iron deficiency anemia. This condition is characterized by a low hemoglobin concentration in the blood, which can result in symptoms such as pallor of the skin, poor appetite, and growth and development. It is common among children, especially when they consume large amounts of milk, which can interfere with the absorption of iron from other foods or displace iron-rich foods in their diet.