Mackerel Flavor: If it's indeed mackerel-based, it would provide a fishy flavor that many cats find appealing.Protein Content: Mackerel is a protein-rich fish, providing essential amino acids vital for a cat's diet.Nutritional Balance: Like other Whiskas products, it would aim to provide a balanced diet with essential nutrients necessary for cat health.It's important to note that specific product availability might vary based on regions or updates in the product line since my last update. Always check the packaging or the brand's website for the most current information about the ingredients, nutritional content, and suitability for your cat's needs.