All Natural The Original Freeze Dried Training Treat Equals Up To 12 oz Fresh Liver Guaranteed Delicious Only One Ingredient 100% Pure Chicken Liver Treats For Dogs Stewart Pro-Treat maintains the aroma, full-flavor and nutritional value of 100% Chicken Liver. Fresh, freeze dried and diced into delicious, mouthwatering treats your dog will love. Pro-Treat is an excellent obedience and training tool, rich in protein and preservative free. Don't throw those crumbs away! Small pieces may be sprinkled on food for extra flavor and nutrition.