Traditionally made and enjoyed for centuries by the people of the Himalayas, 100  natural hard cheese is now available as a long lasting chew for dogs  These chews are proudly made in Europe using 100  cow milk, thus adhering to high standards of production whilst still using traditional Himalayan techniques. Yak Snacks are:- Long Lasting (Note no guarantee on how long they will last. They are softer than the likes of antler, but much tougher than most regular dog chews) 100  Natural     It is simply cheese derived from 100  cow milk No artificial preservatives or colourings Grain & Gluten free Rich in Calcium & Protein (over 60 ). Virtually lactose free Handmade Zero waste     when the chew gets to be very small, pop it in the microwave for 30-45 seconds until puffed, and feed to your dog as a tasty puff chew.