I have a dog with porcupine quills in her snout..

If your dog still has pain after the quills are removed, you may give buffered aspirin like Bufferin. The usual dose is 10 - 25mg per 2.2 pounds of body weight 2 - 3 times a day. DO NOT give aspirin to cats.

Tiny quills or pieces of quills left in the skin may develop little abscesses as the body tries to eject them. As long as they are small (pin point size), you can pop them like pimples and dab antiseptic solution like Betadine on the wounds. Dilute it with distilled water to the color of weak tea. You can use this 2 - 3 times a day for 2 - 3 days. If the sores haven't cleared up in that time, take your pet to the vet.

Watch the wounds for several days after you've removed the quills if there is any swelling, redness, or discharge, your pet will need antibiotics from the vet.

Porcupine quills can break off and remain undetected. They will travel through the body to places such as the eyes, brain, and spine. Continue to watch your pet for several months after the injury for anything unusual. If anything happens, be sure to tell your vet that your pet had quills, because it may be related to her current problem.

&  "Home Remedies for Dogs With Porcupine Quills and Foxtails" 26 July 2011.

The dogs – Mahola, Nestah, and Soljah – had a run-in with a porcupine in the city of Saskatoon in central Saskatchewan, leading to a number of grisly quill-inflicted injuries, which you can see here in the pictures.

[NSFL] Why not to let your dog mess with porcupines, ever

Bulldog with porcupine spines originally posted by Animal Emergency Center of Norma DANBURY, N.H. — Police say a dog that had a run-in with a porcupine and got a face full of quills is doing much better and has been reunited its owner in New Hampshire.

Confrontations of pet dogs with porcupine are not new

DANBURY, N.H. — Police say a dog that had a run-in with a porcupine and got a face full of quills is doing much better and has been reunited its owner in New Hampshire.

This poor stray dog was found with a porcupine quill stuck in his eye

The purpose of this retrospective study was to identify factors associated with quill injury in dogs. A second objective was to determine the risk of complications and any factors that would predict the likelihood of complications. Hospital records of 296 porcupine quill injuries in dogs from 1998 to 2002 were studied. There was an increased occurrence of porcupine encounters in the spring and fall months; Siberian huskies, rottweilers, and German shepherd crosses were significantly overrepresented for quill injuries. There was no association between risk of complications and either number of quills or antimicrobial use. Increasing time between quill injury and presentation was associated with an increased risk of complications. Because of the increased frequency of complication with a longer interval until presentation, clients should be strongly encouraged to bring the dog in as soon as the quill injury is discovered. Patients presented after 24 hours should be monitored closely during the first 3 weeks after injury, as most complications occurred during this time.Encounters between dogs and porcupines, resulting in quill injury, are common in regions where porcupines are endemic, but few papers have described the frequency of and outcomes in dogs receiving quill injuries (–). Reported problems include pain, local tissue irritation/trauma, infection of tissues deep to the skin, quill migration into joints or vital organs, and complications associated with penetration of thorax or abdomen (–).