Beef Liver Manufactured by Loyalty Pet Treats. Thin and crispy superior quality, Australian grass fed Pure Beef, you're feeding the highest quality liver treat in the world. Smell the difference see the difference with Loyalty Pet Treats. Manufactured by Loyalty Pet Treats. Our Beef Liver are thin and crispy, an exceptionally nutrient-dense treat full of vitamins, riboflavin, zinc, protein, niacin, iron and phosphorus. Now you can be confident that with Loyalty Pet Treats Nutriseal™ processed Australian grass fed Pure Beef, you’re feeding the highest quality liver treat in the world. Mother Nature designed pets to thrive on liver. Feed in moderation as a treat only.