My baby is not gaining weight, her weight is constant from 4 months. Is it normal or need to be consulted..

A. Hello father how has it been with her activity is she normal as usual or she is been dull ? Babies by the age of 4 to 6 months double their birth weight and then by the age of one year they triple it give her solids and by now gradually add in more variety of food groups .. such as egg yolk , dry fruits and nuts , dals , lentils like chana , rajma , panner , ghee , sago , fruits and vegetables