This may sound like an odd question, but were you Group B +? If so, it's possible the antibiotic IV you got could have messed up Marlo's intestinal flora. Natalie's poops weren't so smelly, but she could clear a room with her farts - who KNEW that 8 pounds of baby could HOLD so much methane?!?!? :shock: :shock: :shock:
Anyway, what helped us was that I got a little bit of probiotics into her in the first couple weeks already, maybe 2-3 weeks old, and it stopped almost right away. Coincidence? Might be, but I'm guessing not.
If Marlo will take a bottle, maybe you could put some in there; if not, maybe you could express enough to mix some in a syringe w/EBM and give it to her like medicine. I know Whole Foods sells probiotics specifically FOR infants, although I just opened a capsule of mine and put some of the powder in a bottler for her and shook it up.
Anyway, a slightly far-out thought, but it DID seem to help us!