My baby boy is 9 months old and still weight is 7.8 kg and height is 72 cm. His birth weight was 2.9 kg. But still he is not gaining weight and not having single teeth

A. Give proper proteins and all the healthy home-made food whatever is been made for your whole family is the right field to be given to the child you can also give egg and chicken and fish from the age of 10 months onwards for the child and teeth can come by the time of 17 months of wait