A lawsuit filed earlier this week alleges that California's ban on foie gras is unconstitutional.

Various bird-farming organizations have asked the state to clarify the meaning of "force-feeding" — the most common method used to fatten up duck liver. The law defines force feeding as "using a process that causes a bird 'to consume more food than [it] would consume voluntarily,'" but foie gras advocates maintain that given current methods of bird production it's impossible to know when a bird has been overfed.

You've got to love a legal argument that starts, "How are we supposed to tell when a bird wants to stop eating if we've got a funnel in its mouth?"