I love Zombieland. I happened to watch it last week on FX couple of times in a row and I was thinking after the movie, The movie never really showed us about their eating habits and how do they survive during the zombieocalypse, what do all the main characters eat during the course of the movie? We know harrelson's character was obsessed on Twinkies but he didn't find one till the end and There was this truck with snowballs in the movie. There was no reference further in the movie if they were surviving on that.

Judging from the timeline in the movie. I wonder if all grocery shops in towns did carry fresh food ever since that mutation struck? Any one has any interesting pointers to my question?