I love Zombieland. I happened to watch it last week on FX acouple of times in a row, and I was thinking after the movie that it never really showed us about their eating habits and how 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 with Twinkies, but he didn't find one until 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 the grocery stores in towns stopped carrying fresh food after the mutation struck? Anyone have any interesting answers to my question?