Answer:
If you are concerned that the 9-month-old girl isn't gaining enough weight despite breastfeeding 6 times a day and baby food from a spoon, the next step in management would be to consult with a pediatrician. The pediatrician can evaluate the baby's growth pattern since birth and perform a physical examination to assess her overall health. The pediatrician may also recommend additional tests or refer you to a specialist if necessary. It is important to address any concerns about a baby's growth and development as early as possible to ensure optimal health outcomes.