Made with pure milk from grass fed cows in the EU, Anco Moo Chews are vegetarian, rich in calcium and omega 3 and are gluten and grain free, They make a great treat for dogs that enjoy chewing and are a natural dental aid. Not only that, you can put the final piece of moo chew in the microwave for 40-60 seconds (depending on the power of your microwave) until it puffs for a crunchy treat, it's like 2 treats in 1! Be sure to allow it to cool completely before you give to your dog to enjoy.