LO is 10 mo. We've been supplementing day care bottles with formula since about six months, as I just couldn't seem to pump enough. We were fine to only nurse on weekends, though. However, my pumping output recently is WAY down - some days I only get three ounces across three pumps at work. I'm fine with supplementing, but my worry is that she isn't getting enough on the weekends when she doesn't have formula.
If your production went down, did you give formula on weekends too? She doesn't seem crazy hungry (she eats 3 solid meals as well), but I, of course, still worry.