These chews were first created and consumed as snacks by the Himalayan people decades ago as a good source of protein. This same idea was taken and turned into an all natural long lasting hard dog chew for your dog. Made from a mix of skimmed yak and cow milk. A small amount of lime juice and salt is added to harden the milk, which is then compressed and smoke dried for 28 days to give the chews their unique flavour loved by dogs everywhere! The K2 Yak Chew contains the highest protein & calcium content with minimal fat and no chemically binding agents and are made from all natural ingredients with no preservatives whatsoever. K2 Yak Chews Medium Recommended for dogs under 15kg Each chew is 70-80g and 12-14cm (approx.) Composition - Yak & Cow Milk (99.99%), Lime Juice, Salt. Analytical Constituents - Crude Protein (min) 59.0%, Crude Fat (max) 5%, Moisture (max) 14%, Crude Ash 5.45% Recommended for dogs 4 months and older.