Is a dog a predator of a porcupine?

At the base of the tail, the porcupine has blunt, hollow quills that rattle when shaken, serving as a warning to potential predators. ... The philosopher Aristotle warned of the dangers of getting too close to a porcupine: the quilled beast could "shoot its deadly needlelike darts" over great distances at hunters and dogs alike. read more

However, if a predator pushes the issue the porcupine has an excellent defense system. They sport up to 30,000 sharp, barbed quills on their backs and tails. When danger approaches, they turn their back and present their quills, protecting their vulnerable heads and bellies. read more