Hi,my 21months old son wt is9.3kg.is this weight is normal or not?his birth wt is3.540kg,first few months his wt gain is good after that ii increases very very slow.he is not at all eat properly.he wish to eat chips,sometimes fruits,but tat is not enough for him..his Pediatric prescribe laktrum for 2 months,is it benefits to increase his wt? Please clear all my doubts and help me how to increase his appetite and good wt gain