Spoil your BFF with something new to chew with a Yak9 Chews Yak & Cow Milk Chew Dog Treat, an all-natural hard chew made from 50% yak milk and 50% cow milk. The milk comes from herds of yak and cow that graze freely in the Himalayan alpine pastures of Nepal. A cheese is then handcrafted and smoke-dried to perfection so your buddy can gnaw on a healthy and long-lasting savory snack. Low in fat and high in protein, you can feel good about offering these special chews to your pooch.