my baby is 5 kg and she is 5 month old...her birthday weight was ,2.5. she looks lean. should I give her formula milk to increase her weight?

A. Your child has double the birth weight by completing the age of five months I am looking at the birth weight and the current weight I can see that 500 g gain is there in a month which means your child is gaining appropriately well say child is not under way this is going very proper