Boffins from Wageningen University, together with more boffins from the Radboud University Nijmegen have recently published a study showing that cry babies produce different feces than other babies. One to two-week-old cry babies apparently have twice as many proteobacteria in their poo and much less of other types of bacteria as compared to other babies, although the study does not say why. It also says that by giving cry babies probiotics, which are found in baby food, these babies will cry much less.

(Link: opmerkelijk.nieuws.nl, Photo of Crying baby by Chalky Lives, some rights reserved)