All DOGSWELL treats contain NO hormones, NO antibiotics, NO byproducts, NO wheat, NO corn, NO sugar, NO BHA / BHT, NO artificial flavors, NO artificial colors, NO gluten, and NO added salt. HAPPY HEART Chicken Breast Jerky is made with 100% all-natural, cage-free chicken breast and fortified with flaxseed and taurine to help maintain a healthy heart. It has omega 3s and is rich in protein, digestible and low in fat and sodium.