Maybe they have the same problem we all do when there is a dog around and your trying to loot things. Press the button right when they come up behind you and cha-ching you just picked up an embalming tool instead of that ruby. Barbas.....stupid dog.
They are food in Skyrim & maybe they are not domesticated?
I met a dog that said some really intelligent things like, "Why don't Khajiit chase me?" and then went on to say, "You, cat face, should be getting chased."
Death Hounds don't bark. Plus, they're bad ass looking. Can't wait until i can transfer my Dawnguard save over to my PC, and give Garmr some Armor Rating and set him to Essential.