I am mean and let them do it on their own, but I have parrot's with larger beak.If you dont cut them open, its been suggested that you need to at least given them a start somewhere on a whole one
Off topic: yesterday, I discovered that my Jack O Lantern was defaced by the neighborhood squirrels
Nothing civilized at all! Just craven gnawing around the eyes and nose
Did they at least have the courtesy to carve a nice design? Some acorns maybe?