Krill oil is obtained through a process called “cold pressing”; while most other fish oils on the market today are rendered through a chemical extraction process. In many cases these chemicals are found as residuals in the finished product. In krill’s cold pressing process the resulting product is 100% krill. As an antioxidant krill is 48 X more effective than fish oil. And finally krill oil is more bioavailable to your dog and cat than is fish or salmon oil. In many of the human supplement markets the #1 selling fish oil is krill. Krill simply out performs all other fish oils.