I tested out the size 2 nipples today, and so far so good. He isn't dribbling out the side of his mouth like when I tried them before. He hasn't had any extra spit up either. And he's finishing his bottles in 15 minutes instead of 30! This will be great during night feedings. As long as he's tolerating it, there's no reason I shouldn't use the faster nipple, is there?
Re: What size nipple is your 10 week old using?