A yak milk chew is a hard cheese that is all-natural and contains no chemicals, preservatives or additives. The people in the Himalayan region of Nepal have enjoyed these chews, locally called “Churpi” for ages. The hard cheese is made with just four ingredients: yak milk, cow milk, lime juice, and a pinch of Himalayan salt. The chew has a mild flavor and hard texture, which makes it a perfect treat for dogs.