Supplementing with formula?

Jennifer • Julius was born Jan 23, 2018 ! Our second Cruz was born July 4, 2019!

Hey ! So I wanted to get input from anyone who had to supplement breast feeding with formula. My little guy is just such an eater and I can’t seem to produce enough to keep up. He is only 10 weeks today and is eating close to 35-40 ounces a day already. He breast feeds first thing in the morning and the rest is bottles of breast milk while I am at work or just before bed so I know how much he takes.

So For anyone else who had this issue:

How did you decide when to feed the formula versus the breast milk? Is there another better option? Did your supply decrease once you added in formula? Did you notice any issues with your baby not wanting to eat one versus the other?

Thanks!