Himalayan Dog Chew is a very hard chew. It is 100% natural with no preservatives. It is an authentic type of cheese eaten by the people of the Himalayas. Depending on the size and eating habits of your dog, this is a very long lasting dog chew. Dogs will work the end of the treat for hours, softening it with their mouths before small parts of it can be slowly scraped off. When you give this chew to your dog, you know that you are providing them with hours of high quality eating entertainment. When the chew gets so small that your dog may swallow it .. simply place it in the microwave for around 30 seconds - the chew will blow up into a larger piece that your dog can eat like a doggie biscuit. Yak and Cow Milk. Salt and Lime Juice.