Due to the harsher climent in Bruma I made the dog look more wild, and because of the Oblivion gate that opens up marked him as essential incase he got hurt. The dog in the Imperial City is killable, both are in the PC faction and can be renamed with "SetActorFullName" Thanks to Slof for her dog reskins. In my game I call the boarder collie Lassie and the dog in Bruma Frostbite.