123 Treats Bones with Bone Marror for dogs is all natural with no preservative or chemicals. Long lasting dog chew, with refillable centre to refill your dogs’ favourite filling. Hickory smoked to bring out the delicious natural flavors. Made in USA from beef shank or arm bone. 3.5-4” length, best for small to medium size dogs. Inspected before shipping to avoid abhorrent repercussion. Guaranteed Analysis: Crude Protein > 30%, Crude Fat > 15%, Moisture < 6%.