Breastmilk & Formula - Lake Dallas,TX

That is very interesting?! I have never heard that. I used to do this with my kids and I did it when switched to whole milk too. The only reason I would think that it would be a problem if you didn't measure the formula right or maybe because formula has a shorter room temperature life than breast milk, but that wouldn't matter unless you were leaving it out? If your Pedi is fine with it and it is working for you then I would keep doing it and not worry what someone elses pedi said.

So your question made me wonder becuase I mix them sometimes for my 9 month old. I googled it & found this article which gave both viewpoints & I think the reason not to is b/c it would possibly diminish your milk supply if you are supplementing with formula.
http://www.breastfeeding.com/helpme/helpme_asklc_ans154.html
hope this helps!

If you are worried about it, why not try using the pumped milk by itself for a feeding or two and then pure formula for another feeding or two - rather than mixing them? Just a thought. I did that with my first, and it worked well. We did it all - some breastfed, some pumped bottles, and some formula bottles.

Hmmm... I think as long as you are mixing the formula correctly prior to mixing it with breastmilk it will be fine. I did this w/2 of my boys. I think they just worry about formula being measured & mixed & then added to breastmilk. My boys are 10 & 8, they seem to have survived. I agree w/the other poster it was more about lack of supply than nutrition. I think you are fine. Good luck!