Ditter, I've been thinking some more about your dog, and wondered whether they know for sure about the walker hound part. I can see the boxer in her, but the other influence that seems very possible to me is basenji. Basenjis are hounds, too. They can have the colors Pinky has (though they can also be other combinations with white) and their ears stand up. Basenjis are small dogs, in the 24 pound range, so that would help to explain why Pinky is smaller than either a boxer or a walker. Like boxers, basenjis are active without being high strung. Whatever she is, she's adorable!
Here is Cosmo, for comparison. We lost him last year at age 17. He was given to us by someone who was at his wits end because of behavior problems, but it was mostly because the man, who was single, had to leave him alone for 10 hours a day in a small apartment, not a good plan for an active breed. After Cosmo had some room to run and some other dogs to play with he was not too much trouble, but he was always a comical and wily little guy.