Go ahead, turn the bag around and look at our ingredients. PureBites® are made with only 1 ingredient; 100% Pure USA Sourced & Made Human Grade Beef Liver. dogs love the taste of PureBites® because our treats are freeze dried RAW to lock in the aroma, texture and freshness they crave. Dog parents love PureBites® because our treats are 100% pure and rich in nutrients for a happy and healthy life.