on my game it was a no fishing game - so they didnt have the "endless supply" of ocean catches available to them - I only had a pop of abt 25 to begin with - hubby woke up and opened my village to check on them because I was sick in bed and there was only 2 kids (both girls) and GC left and no food - I am not sure if there was an event (usually my events pop up 1st thing in the morning on all my villages)
Unfortunately on that particular village that was the 3rd time I had something happen that left me with just children and no adults.