These toppers are air dried to perserve the nutrient values, plus, we add POSTBIOTICS (this is prebiotics and probiotics combined) for digestive and microbiome health. This recipe is based on food science. It loaded with antioxcidents, vitamins and minerals. Our ingredent have nature anti-inflamitory properties to support healthy joints, blood pressure control and is low glycemic, making it great for diabetic dogs because of low blood sugars. It is loaded with Omega fatty acids that suport a healthy skin and coat. We use real peanut butter for the picky eaters. This recipe is GMO Free, Gluten Free, and Grain Free.