Himalayan dog chew: If you can't stop chewing behavior, channel it. Perfect for hard-core chewers, these natural dog treats are rock-hard and long-lasting. The surprise: they're made of cheese! Based on a traditional people snack from the Himalayan highlands, chews are made using traditional methods and an ancient recipe of boiled yak and cow milk, salt and lime juice. Contains no gluten, chemicals or preservatives and is low fat.