You stated he drinks milk. Suggest giving him milkshakes (milk and
ice cream blended) and yogurt smoothies (yogurt, ice cream, and fruit blended) in place of milk for extra calories and protein. Have you tried chewable children vitamins? They look like ‘gummie bears’ so child think it is candy, however, they are a multi-vitamin for children. Suggest giving it to him daily for vitamins and minerals to decrease his illnesses. The most important thing is to relax at meals.