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Tritronics is good for training, but it seems most of those dogs that hate porkies just get worse with age.
I don't know how to get quills out but I know how not too. I was reading outdoor life and they had a tips for hunters section. It said if your dog gets quills in it;s face just tie a rope around his waist and toss it over a rafter in the garage and pull him up high enough to pull the quills out. When I lifted my german shorthair up he turned into a pitbull and almost tore my shirt off before I let him down then we went to the vets.
I've always just talked to them as I worked on them. I know a few guys who have went to the vet and gotten a light drug that puts them half groggy but not to sleep and that helps, sorry I can't remember the name of it, but I bet your vet would know.