We eat. All firefighters take in all of the major food groups (and a few others also) to convert into sugars, proteins and other nutrients that our bodies need to function. We are on duty for 24 hours, sometimes longer, and need sustenance. I smile when people comment on us being at the store. I can’t think of a job that you don’t get a lunch break. Prisoners are fed. Astronauts eat out of toothpaste tubes in space. We do not get a guaranteed meal break.