The FirstMate Cat Grain Free Limited Ingredient Duck & Blueberry 4lb is a cat food product designed for cats with dietary sensitivities or those who benefit from a limited ingredient diet. Here's some general information about this product:

- Brand: FirstMate
- Product: Grain-Free Limited Ingredient Cat Food
- Flavor: Duck & Blueberry
- Size: 4lb (4 pounds) bag

Key features:

1. Limited Ingredients: This cat food is designed to have a minimal number of ingredients to reduce the potential for food sensitivities and allergies.

2. Grain-Free: It is grain-free, making it suitable for cats with grain allergies or those who benefit from a grain-free diet.

3. Duck & Blueberry: The main ingredients are duck and blueberry, providing a combination of high-quality protein and natural fruit flavors that many cats find delicious.

4. Bag Size: This product is packaged in a 4lb bag, providing a convenient quantity for cat owners.