We looked at yak cheese chews the way a careful owner should, weighing how long they last against how hard they are. These chews are made from hardened Himalayan yak and cow milk, and that density is exactly why they last for hours and also why they need supervision, so in our evaluation durability and dog-size matching went hand in hand. What we like is the short, recognizable ingredient list, typically yak and cow milk with a little salt and lime, and the lactose-free claims many brands make. We assessed these against the manufacturersโ€™ stated ingredients and aggregated owner feedback, not a home chew test. Because they are very hard, they suit determined chewers but can pose a risk to teeth or become a choking hazard once worn down to a small nub. Match the chew to your dogโ€™s weight, supervise chewing, and take away the final small piece. If your dog has dental issues, check with your veterinarian first.