Yep. Agree it’s not clear who fed the baby.
FWIW I think there’s a typo in that news report. It should be splinting if the diaphragm (a medical term relating to a lack of diaphragmatic function causing respiratory distress and reduced oxygen) not splintering (which isn’t a recognised term.)
diaphragmatic rupture would be the term if caused by violent vomiting, and it’s very unlikely/impossible