Sleuth-dog

"No force must be used upon him. Within what time wilt thou find him out?" / "Within thirty hours, so he have not crossed the Lothian firth–If it is to do you a pleasure, I will set off directly, and wind him as a sleuth-dog tracks the moss-trooper,” answered Christie.

At the darkenin' he escaped upon the moss ; three troopers, guided by a muffler and a sleuth-dog, pursued him ; an" as we crossed the bog this mornin', we found ane o' the troopers sunk to the middle in't, an' his horse below him; [...]

He then had a chance to reprise his role as the sleuth-dog in the television version of The Thin Man and won two PATSY (Picture Animal Top Star of the YearI Awards for his performances in 1959 and 1960.