Hello Monica, Is your baby not breastfeed.
There are cases, when babies are allergic to the ingredient in formula. In such cases, I would recommend Lactogen stage 1. Lactogen is very light on the baby’s tummy which is a great thing because it is easily digested by the baby. The bad thing is babies’ tummies are emptied earlier than they should. you can read Lactogen 1 Infant Formula – Used And Reviewed