http://www.thepetcenter.com/gen/pq.html
http://www.bestfriendspetcare.com/Pe...pinequills.cfm
The quills can penetrate deeper if they fill with fluid. Quills are hollow,cutting the ends off with a scissor before removing them reduces the pressure inside the quill & keeps the barbs from portruding whick is very uncomfortable for the dog,or so im told .Your vet is gonna love this one.
best of luck,hope it turns out ok