Unlike some smoked bones sold for dogs, ours contain no added salt, nitrites, or nitrates. Just raw bones smoked for a day over a low heat hardwood fire. Dogs love them. They won't last forever in the open, so after a chew, they can be bagged and frozen for the next delicious session. Some, like neck bones end up being devoured like a meal, or partially devoured, as with marrow bones and knuckles. Others like ribs and kneecaps are mostly tarter-busting and recreational.