Rosemary is mainly used in pet food as a natural antioxidant and flavor regulator. It is suitable for high-fat pet food, meat snacks and freeze-dried products. It can delay the oxidation of fats in the food, extend the shelf life, and at the same time provide a unique herbal flavor, enhancing the palatability of pets. It has strong stability and can retain its efficacy even during high-temperature processing without the need for additional artificial preservatives. This meets the "natural preservation" formula requirements and is suitable for all types of pet food that need long-term storage.