my baby is not gaining weight properly I'm giving 3 meals in a day but his weight is only 6.8 kg but he is active doing all mile stones at time

A. dear mum , was the baby premature or low birth wt as it can affect the wt gain n catch up growth may take time consistency of food should b soft n lumpy give variety of food groups dal , legumes beans nuts oulseeds powder egg non veg curd paneer add ghee