All natural. Hartz established in 1926. For over 80 years, Hartz has offered products that optimize your pet's health and overall well-being. At Hartz, our goal is for your pets to live happier, healthier and longer lives. Natural treats like pig ears are a natural way for you to satisfy your dog's innate desire to chew. Additionally, pig ears provides important dental benefits as they will naturally reduce plaque and tartar on your dog's teeth as they chew. Hartz pig ears provide your dog with a natural and fun chew that promotes better oral health. Satisfies your dog's instinctive urge to chew. Naturally promotes plaque and tartar reduction. Ideal for dogs of all ages and sizes. Contains products from: USA, Canada, Brazil or Spain.