My baby is not chubby she is 3 months old her weight is 4.25 kg birth weight is 3 kg she is very skinny

A. Chubby and weight are 2 different things, your baby's weight is good for age. Difference in body's physical growth and development will be visible after 3 months and Mother Feed is the best to count on. So don't worry about the appearance as it depends on genes too