Himalayan Dog Chew is a very hard chew. Although cheese, it is sometimes referred to as concrete. Depending on the size and eating habits of the dog, this is the longest lasting dog chew that you can find. Dogs must work the end of the treat for hours, softening it with their mouths before small parts of it can be slowly scraped off. It is 100% natural with no preservatives. It is an authentic type of cheese eaten by the people of the Himalayas. When you give this chew to your dog, you know that you are providing then with hours of high quality eating entertainment.