When you pinch off a piece of this loaf, the pinched off part automatically regenerates. If you throw that piece of bread on the ground, it summons a duck that will bite people's ankles. You have absolutely no control over this duck.

Duck stats: 15 HP, AC 25, +72 initiative, always hits, -1HP random person

Eating the bread is not generally advised; if any part of your digestive track happens to resemble ground in any way shape or form, well ... let’s just say that the duck summoning feature is perfectly functional in enclosed spaces.