my son not gaining weight at all

A. Hello good evening !! Check if baby growth parameters are according to WHO guidelines..If baby growing well but under weight no issues . Maintaining balanced diet with high protein,calorie rich foods,good fat foods helps in weight gain. Banana,mango,potato,kichdi,dal rice,curd rice,parantha,idly,ghee,cheese,butter,curd,paneer,dry fruits and nuts,egg,meat ..