Your dog loves chew treats, but you're justifiably leery of the mystery ingredients they often contain. Thankfully, there's nothing mysterious about Natural Dog Yak Cheese Dog Treats. They're made with pureyak milk – never cows' milk that can contain hormones or antibiotics. These tough chews are lactose free and rich in protein, minerals and healthy fats. What's more, there's no odor and no waste. When your pooch has gnawed his chew down to a nub, simply pop it into the microwave to create a cheese puff so your dog can devour every delectable bit.