The Curs are considered all 'round dogs, some of the bloodlines go back 200 years apparently. They are farm dogs, hunting dogs, treeing dogs, family dogs, guard dogs, and big enough to be good foot warmers. They are listed with United Kennel Club, but not with AKC, yet. I've only met one, she was very social able and warmed right up to me, but I am a "dog" person. We are considering getting one.
Most of the lines are out of the south, so they probably are somewhat thin coated. Solve that with a hunting jacket
., and a dog door! Officially, I think they are called Blackmouthed Curs. Some interesting info on them on several websites. Got to introduce your wife to your buddies's dogs, that will win her over!
Hawkdancer