All natural premium chews for dogs. Raised in the heartland. 3 pack. Treated by irradiation. Hartz America's Prime is made with high quality All American pig ears that you can feel good about giving your dog. With an all natural smoked flavor he's sure to love, these pig ears satisfy your dog's instinctive urge to chew, which naturally promotes plaque and tartar reduction. All natural. Promotes plaque and tartar reduction. Satisfies your dog's instinctive urge to chew. Ideal for dogs of all ages and sizes. Proudly made in USA.