Does anyone know what the best formula to supplement with?

You are very welcome. I've been supplementing for a lil over 2 months now and I am still nursing. My recommendation is that you try to spend atleast one day a week letting baby nurse for how ever long they want to keep your supply decent. And if possible let baby nurse at night because that's when women make the most milk. Good luck 😀

@blue_87, Thank you so much! Just sent the hubby out to Walmart to pick that up! :)

@kashs_mommy2016,

I supplement with parents choice sensitivity or the Costco brand because it's cheaper and you get 5 oz more. And my son does very well with both but if you get wic then I would suggest gentle ease by Similac