If he is 2 years, 2 months, then his weight is between 5-10th percentile and height is on the 5th percentile which indicates he is still on the growth chart
and normal. If his age is 3 years old then both his weight
and height are below the 5th percentile. Suggest giving him Pediasure in place of milk at meals (in place of the milk) and snacks. Some tips for additional calories: If he likes pasta, then add meat or cream sauces to the pasta instead of plain tomato sauce or plain pasta.