Sam"s Yams Big Boyz is our largest dog chew size. Made of whole thick slabs of dehydrated 100% sweet potato. The chews have a hard surface, excellent for dental health, and a chewability that dogs love. All Sam"s Yams dog chews are particularly well suited for senior dogs whose teeth and gums are more sensitive. Sam"s Yams are totally digestible and an excellent nutritional chew, far superior to many other healthy dog treats in any nutritional comparison. Sam"s Yams products contain no wheat gluten (a common dog allergen) or other additives. Veterinarians recommend our product because it is hypo-allergenic. Made in the USA.