A "prey model" or BARF (Biologically Appropriate Raw Food) diet usually aims to provide all nutrients through meat, bone, and organ meat. However, depending on the variety of proteins used, some owners add Omega-3 fatty acids (like fresh sprats, fish oil), kelp, or probiotics to fill nutritional gaps. If you are not using a "complete and balanced" commercial raw blend, consulting with a veterinary nutritionist is recommended.