Duck feet are a natural source of glucosamine and chondroitin which help to relieve joint pain, they're also a great natural tooth cleaner.
No ingredients other than Canadian duck. (no preservatives, dyes, fragrances, chemicals, grains or any other crap).
No chemicals like other dental chews.
Minimal bone content which is dehydrated and does not splinter. The feet are mostly cartilage which makes them hard.