A 2-year-old girl from Delhi is brought to the well-child clinic for routine immunization. On measurement, her weight is 10.5 kg (25th percentile), height is 82 cm (10th percentile), and MUAC is 14 cm. Her weight-for-height is 92% of expected. She has mild bilateral pitting edema of the feet. The mother reports a 2-month history of poor appetite and loose stools. What is the most appropriate next step in management?