Mo. Rev. Stat. § 196.333: Markings in case of eggs from different species of fowl.

No person shall sell or represent eggs from any other species of fowl as chicken eggs, or sell mixed eggs from more than one species of fowl, or eggs from ducks, turkeys, geese, or any species of fowl other than chickens, without marking the containers and subcontainers of such eggs or otherwise indicating fully by sign, placard or other inscription the species of fowl from which such eggs were produced.