Bo is apparently remembering where the last correct article was and going there, to pick up the article placed there. He went so far as to find the scented article, eat the cheese off it, then go over and fetch the one located in the same spot that had been correct the previous time. Its a solution -- just not the one I want!
He also breaks concentration when someone is yelling in a nearby ring. Happened at the trial over the weekend and in class tonight.