Real Food, Real Nutrition, Real Dog Treats. Only two ingredients, pure natural beef liver & real blueberry. We added real Blueberry to the beef liver in our original Benny Bullys Liver Chops®, making Benny Bullys® Liver Plus Blueberry a highly palatable liver treat with healthy inclusions. We use Canadian blueberries, government inspected, and grown in clean healthy conditions. Their fresh natural flavour enhances the taste of the beef liver. There is also a rising awareness of the health benefits associated with dietary antioxidants, which occur naturally in blueberries.