Well, that's a secret! But we do guarantee our freshness, as we ship daily to you usually within 24 hours of your order. Unlike some companies, we do not irradiate our products or add preservatives or chemicals. Our unique dehydration process meets USDA standards by implementing processing temperatures which quickly destroys any harmful bacteria and germs. Our Lucky Treats are bagged and sealed immediately ensuring optimal moisture content. We handle our chicken in a frozen state to eliminate spoilage, keeping your treats fresh and safe from bacteria.