Anyone tried these for their dogs or even heard of these? They are supposed to be long lasting, even for the tough chewers and Teddi has one now so we will see. We get the weirdest stuff in at work lol. I was staring at these things for a few days now, they just looked so weird that I didn't want to try them. Well a lady came into work today and said she did research and they are 100% natural, and made from yak and cow milk, cheese, some salt and lime juice. She also said people in Tibet used to eat these same chews while working. They would keep them in their pockets and have something to snack on....interesting.