COEVO™ THE HINTERLANDS OPEN PLAINS FD+K™ FREEZE DRIED + KIBBLE FOOD FOR DOGS -RAW BEEF, PORK & BISON RECIPEOPEN PLAINS FD+K BEEF, PORK, & BISON RECIPE FOR DOGS The Open Plains FD+K recipe mirrors the animal proteins that hail from North Americas Great Plains. We pair our Evolutionary Fit kibble that starts with beef, pork, and bison with our signature VitaBoost freeze dried inclusions to provide a boost of raw nutrition and flavor.