The Brazilian Pet 100% Natural – Over 6 inches- Real Cow Ears (100 Pack) Prime Dog Chews, Free Range Grass Fed Cattle, No Additives, Chemicals or Hormones is a great choice for your dog. These ears are made from 100% natural, South American sourced, grass-fed pastured-raised beef. They are highly digestible and can be chewed all day long without any problems. The packaging system is also very innovative and prevents waste on transportation and storage.