yes, I formula feed. I breastfeed like 80 percent of the time and formula feed the rest (about 2-4 oz of formula a day) I use enfamil gentlease and it really is easy on her tummy. I tried enfamil newborn and it was a bad experience so it was trail and era. I find it easier doing both. Baby always gets mommys milk which is best but gets fed with formula when youre away or cluster feeding becomes overwhelming or whatever your reason is.