Breads and Grains. 1  Store-bought bagels: 1 to 2 weeks (refrigerator) or 2 months (freezer) 2  Commercial breads: 1 to 2 weeks (refrigerator) or 3 months (freezer) 3  Unopened flavored rice: 6 months (pantry)  Unopened white flour: 6 to 12 months 1  (pantry) Muffins: 1 week (refrigerator) or 2 months (freezer)
Of course, the most famous characteristic of this animal are the quills. When a porcupine is threatened, it assumes a defensive posturehead and shoulders lowered, back to the threat, every quill erect, tail thrashing back and fourth. This is usually enough to scare away any would-be predator.
Porcupines cannot shoot their quills! Quills are just modified hairs made out of keratin, the same substance found in our own hair and fingernails. The quills do not cover the underside of the porcupine. Porcupines have muscles at the base of each quill that allow them to stand up when the animal is excited or alarmed.