I have a nice collection of...

Porcupine quills.  When I let the dogs out this afternoon (in the dark - lol), they took off for the neighbor's yard under the tree.  I thought they were going to see if their neighbor dog was out.  There was some coughing and sputtering, and when they came back Pookie had three and Pepper had eight sticking out of their muzzles.  They were quite agreeable to stand somewhat still while I pulled them out.  I suspected it was a porcupine - a quick google search confirmed that yes, they were quills.  Never a dull moment!