I had my English Setter bite a porkie once and got a mouth and face full of quills. I gave the porkie two blasts with a 12 gauge and only animal I ever killed in anger but I was young too.
It took my parents and I to hold the dog down and pull the quills and she didn't like it one bit. Next time we saw one in the woods I told Penny "no" and she looked back at me like to say I'm not stupid twice Dad.
Anyone that hunts a dog should carry a dog first aid kit, first aid book and pliers for pulling such things as quills.