Let's start out with some facts and fiction...
FICTION:
1.) Porcupine Quills contain Poison. False! The American Porcupine does not. The Indian Porcupine does. Guess which country the Indian Porcupine comes from?
2.) Porcupines shoot Quills at enemies in Projectile fashion. False! They wave their tail and back when in distress and must physically touch an enemy for the Quill to stick in it. Likewise, if a dog touches a Porcupine, the Quill will stick in it. Quills do not "shoot out".
3.) Porcupine Quills are pressurized and must be snipped at the end before they are pulled out. False! This is utter bullshit. They are very slightly barbed, but not pressurized by any means.
FACT:
1.) Getting a Quill in you is very painful. True. Even one hurts like hell. Like a little dagger sticking into your skin.
2.) If your dog looks like she is in pain, take her to the Vet. Don't try to remove Quills yourself unless there is only 3 or 4 of them. Your dog may need sedating to kill the pain.
3.) If your dog has less than 5 Quills, you can avoid Vet fees by trying to remove them yourself. Read below for directions.
REMOVING QUILLS YOURSELF, WITHOUT A VET... (if there is more than 5, see a bloody vet!)
You will need:
1.) a strong grip.
2.) disinfectant (hydrogen peroxide etc)
3.) a set of balls
4.) a second person would help to keep Millie still.
First, have your disinfectant handy.
Now grip the quill as far down as you can, closest to the skin of the dog for best grip. What you want to do is very slightly turn the Quill at a very slight angle as you pull it. Don't pull it straight. The barb is not very big, but to avoid excess damage to Millie, pull it out quickly at a slight angle. As soon as the Quill is out, place it away to one side and do the next one.
Once all of them are out, dab the affected areas with disinfectant on a tissue to stop infection
That's it! All done. She'll be hurting for the rest of the day. Just let her rest.
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Hope this helped.