PureBites Mini Trainers Beef Liver Dog Treats are Raw Freeze Dried Trainers and are the ultimate high-value mini-sized limited ingredient treat, topper, or training reward. Made with only 1 simple human grade ingredient you can read, pronounce, and trust: 100% pure USA beef liver. Nothing else. No artificial colours, fillers, or sweeteners. Mini PureBites Trainers are specially cut small pieces of pure protein for training or for small dogs.