Yes they did. I have a circular floor plan in my house so they are able to go around the race track continously. Benny enjoys using the back of the couch as a turn around to go back the other way.
Roscoe does that also. I have a mirrored closet door and he will see himself in the mirror. He'll sit and stare at himself and sometimes reach out a paw and try to touch himself. I think he thinks there's another basenji looking at him.