Just because you feed raw doesn't mean your dog cannot enjoy his Kong! There are plenty of things to put in it that are part of a prey model diet. Ground, minced, and chunked meats with or without bone can be packed in and frozen. Keeps your dog busy and provides species appropriate nutrition all at the same time! Here's an example of a sardine Kong I did today for Amos. Everything was cut in pieces except for the head, which stuck out as there was no room left in the opening.