hai doctor my daughter is 3 months old she is not gaining weight properly..her birth weight is 2.480gms and now by 3rd month she is just 4.780gms..she is active and playing well, voids well and feeding well..what can i do for her weight gain..is there any syrup for weight gain..im using zukuvit and vitamin d3 drops from 14 days baby but she is not gaining weight..how can i improve her weight is there any other syrup for weight gain