Chicks at this stage do voluntarily miss meals, I didn't see her this morning so I can't say what I think is/was happening, but our chicks have all decided that napping was more appealing than another meal. Our chicks get their first meal around 3:30 am, so that by the time most of us are logging in in the morning, they have had at least one if not more breakfasts ... is it possible she just slept through it? Birds die fast but this one is a little faster than I would have expected from a bird that seemed healthy (to someone a thousand miles away via webcam) such a short time ago. And the banders at this site are very experienced, they would have noticed obvious problems with the chick - hard not to when you have them in your hands ....
Hopefully we will hear more soon ...