i don't know. we're dealing with a lot of spit up too. my first was a super fountain, but looking back, i'm almost sure he had pretty bad reflux that was never diagnosed.
that coupled with an extremely sensitive gag reflex and he threw up every single day untill he was 3. and pretty much all day when he was a tiny baby.
with my dd she spit up every now and then, but i think it was much more "normal".
now we're dealing with lots again. not as bad as ds1, though. he's extremely gassy, but he has a poor latch/suck so he gets lots of air that way. but, i'm working on cutting out dairy to see if that helps. i'm almost sure it will. i had to cut a lot out with dd as it agitated her digestive system(she was such a happy go lucky baby, she was never upset by anything though). dh was dairy sensitive when he was little, and both of my older kids have sensitivities, i think we just need to go dairy free throughout the whole house. i hope it helps. i can't stand to hear rowan crying cause his belly hurts so bad.
poor little guy.
oh i guess i should state that "lots" to me is he's spitting up after almost every feeding(and he nurses a lot!) and frequently in between, along with crying from a gassy belly and lots of burps. it's usually just a little spit up, but at least once a day he seems to empty his whole belly!