I'm starting to think maybe my 4 month old dd Abbie has one of these, hers is from 11:00 to 12:30 in the afternoon. The first time was about a week or so ago, she got really fussy and cried - at the time she was just getting over gastro plus meeting her grandpa for the first time. About a week later she was crying inconsolably around the same time of day, her grandpa was visiting again so we attributed it to that. Today she had a major crying fit just before and after her 11:00 am bottle, I thought maybe she is going through a growth spurt and wanted more formula.....but maybe its an Arsenic Hour rather than the different events that caused her fussing? Interesting!