If this is the dog I am thinking of, then once he gets to the place he needs to go to, then he is there.
"Arf! Arf! Arf! Arf!"
"What is it, Timmy? Barbas gone missin'?"
"Arf! Arf!
"Well, where is he?"
"Arf! Arf! Arf! Arf! Arf! Arf! Arf! Arf! Arf! Arf! Arf! Arf! Arf! Arf! Arf! Arf!"
"Haemar's Shame? You sure?"
"Arf! Arf!"
"Awright, Timmy. But if he ain't there, I'ma gonna sock you on the nose with a scroll of Banish Daedra!"
"(whimper)"