Formula change

K • Mommy to Oliver 10/17/2018 💙

I am currently pumping/using a nipple shield but my supply is pretty low so we supplement with Similac Pro Advance but lately our son has been spitting up more than usual. I’m wanting to try Similac pro sensitive but from what I understand, I need to call his pediatrician first. What do I say? Anyone else’s baby on the sensitive formula?