The first draft of the script was written from the vegan point of view, but the writer/director felt it would be easier to connect to the characters is they were from the non-vegan majority of the population.
To prepare for the role, Fabrice Eboué took on 20-30 pounds, let his mustache grow and cut his hair to fake baldness.
The place where the movie takes place is never mentioned, so that the audience could feel it could happen anywhere. It actually took place on Le Havre, Normandie, far enough from Paris in order to get a summer camp feeling during shooting, but also close enough so that those who wanted to come home for the weekend could.
When they go to their friends house for a BBQ, it's a bottle of Stubbs BBQ sauce on the table