I adore dogs and I know how intelligent some are. I also know how they can be so attentive to any sign from mummy/daddy in attempts to please them that they can get confused. Or, pick up signals to try to hide away from bathtime, however you attempt to try to disguise the impending issue.
These are working dogs.
They were chosen from thousands because they showed particular skill.
Then they were trained, trained, trained, trained.
They are not a household pleaser being confused by different owners who want them to sit, stay, shut up, talk on command, roll over, all inexpertly taught in lackadaisical manner when folks think of it.
They are the racehorses of the dog world. Finely tuned, extremely valuable, able to perform at Olympian levels as routine. They are worked every single day with the same skilled master. It's like comparing apples to oranges.
Any doubts of the value of these cadaver dogs should have been dispelled by the discovery of the Long Island Killing Fields but what ho - not in the Universe of the McCann!