All-natural hard cheese made from yak milk, cow milk and lime juice. No added salt or preservatives. Traditionally made for human consumption, this smoky hard cheese has become a favorite for dogs. Usually lasts for days for moderate chewers. Harder than rawhide and bully sticks, softer than antlers or bones. As the dogs gnaw on it, the chew softens allowing them to scrape off bits of the cheese. Safe for puppies and teething dogs, but always consult your vet for dogs with sensitive teeth. When a small piece is left over, take away to avoid choking risk. Microwave small dry piece for 45-60 seconds. It will expand 2X in size. Let cool and your dog can enjoy this crunchy treat safely. Virtually no odor, and leaves no stain