When you're a large enough naga, it easily is either expensive or illegal to properly indulge yourself in prey - hence it's a good idea to snap up permits for felling a couple of moose and head out to the forest with your trusty hunting rifle. :3
Even if it gets progressively harder to track down and shoot moose after ingesting the first one, it's good to cram oneself as full as possible to avoid eating for months - the reduction in food bills is rather massive! ^^