help my child gain weight

my son is an active 9 yr old. He eats almost anything i put in front of him. He loves cheese, yogart, pasta, but not a big fan of meat. He has not gain weight in 3 yrs but has grown about 6in in the last 16 months. im at a loss as to help him gain weight. any sugestions

[Renee Radenberg]

Both his weight and height are below the 5th percentile for his age. Suggest replacing his milk at meals/snacks with milkshakes (milk and ice cream blended), or yogurt smoothies (yogurt, fruit, and ice cream) for additional calories and protein for weight gain. Try engaging him in the kitchen more. Have him help you with planning and preparation of food, and setting the table. Hopefully this will increase his interest in all foods including meat.