These cow ears are colored and flavored using a natural blueberry extract, not artificial dyes or flavorings. This extract makes them non-staining and because they are baked there is no greasy mess like with pig ears. Completely digestible, low in fat and high in protein these are a great alternative to rawhides. When compared with pig ears, cow ears are cleaner, healthier, more flavorful, and generally larger and less expensive than pig ears. 100% Made in the USA these cow ears are high in quality and minimally processed.