It's perfectly possible to.
Introducing formula feeds can affect the amount of breast milk you produce. There is also a small amount of evidence to show babies may not breastfeed as well.
It's perfectly possible to combine breastfeeding with bottle feeding using formula milk or expressed breastmilk. If you can, wait until your baby's at least eight.
Some moms might want to try breastfeeding and bottle-feeding her baby. If that sounds like you, here's how to do it.