Smokehouse Pig Ears with Header Natural Dog Chew are from USDA approved meat plants. All of Pig Ear products are available in Natural and Smoked variety. Smokehouse Pig Ears with Header Natural Dog Chew are slow roasted for up to 48 hours to insure maximum flavor. Piggy Slivers are whole Pig Ears that are cut into smaller pieces which are great for smaller dogs or dogs on a diet. A 100% natural treat.