My son is 2.5 years old. He has not gained weight in last 1 and half year. His weight is only 11.5 kg. But height is more than child of her age arround 94 cm. And he is suffering from constipation for long time. Even he pass stools 5 days in a week but it takes him 15 minutes to pass. He runs here and there sit stand run keep on till he pas stool. The rear part is hard stool and rest is normal Having speech delay . Picky eater throw tantrum . Even he understand whatever is told He speaks counting 1 to 10 Identify alphabate and words like animal name birds name fruits name. But clarity of speech is not there. He repeats same words many time and force evryone to listen the same words every time. If ignore he shout and put our fingers and says to listen. I am worry about his weight mostly because we tried evry thing like pediasure . But he is not interested in roti sabji. He keep eating nuts like salty penauts, 4-5 cashew nuts and 3-4 almonds daily. What should I do . What to give