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No. The quills do loosen with time and can fall out on their own - just as our hair does everyday. On rare occassions, loose quills can fly off when a porcupine flicks its tail, but the porcupine doesn't know that the quill will come off and has no control over where they go. No, porcupines can't throw their quills. But they have a tiny barb--like a fishhook--at the end of each quill, so if a dog or other animal tries to bite them, the barb can hook into the dog and when the dog pulls away, the quill is pulled out of the porcupine and stays stuck in the dog's muzzle or mouth.

Do NOT try to pull out the quills! (If you do try to, the barb will tear the dog's flesh.) Since the quills tend to work their way deeper into the dog's flesh and can cause infections, a trip to the vet is called for. The vet will anesthetize the dog and cut out the quills.

After being quilled, a dog should be kept indoors during morning and evening twilight, since he/she is likely to seek out porcupines (presumably to get even!)

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16y ago
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Q: Why do porcupines have sharp quills?
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