Instruction: First, identify the target attributes from the provided list. Then, scan the product title, description, feature, and brand to extract the values associated with each target attribute. Finally, create a list of dictionaries, each containing the extracted attribute, its corresponding value, and the source where it was found.

Input:
Product title: Natural Balance Limited Ingredient Diets Chicken & Sweet Potato Formula Canned Dog Food
Product description: Natural Balance Limited Ingredient Diets Chicken and Sweet Potato Formula Canned Dog Food - Natural Dog FoodNatural Balance(R) Limited Ingredient Diets are proven formulas for dogs with allergies based on our unique blend of a premium protein and carbohydrate not commonly found in dog foods. We use quality meats from USDA approved plants (no by-products), as well as carrots and pototoes. This unique blend assures a high digestibility and contains all of the nutrients, vitamins and minerals necessary for your dog.Natural Balance(R) Limited Ingredient Diets Canned Dog Food is a complete and balanced diet for your dog, yet also perfect as a delicious addition to our Dry Dog Food. For growing puppies, the Canned Dog Food can be mixed with Natural Balance(R) Limited Ingredients Dry; a mixture that could ease the weaning process and stimulate appetite during this stressful time. For lactating bitches, a gradual increase in food intake is necessary starting around week 8 or 9 of pregnancy. Adding Natural Balance(R) Limited Ingredient Diets Canned Dog Food satisfies the increased caloric requirement. Also great for picky-eaters and can help kindle the appetite of the older dog.
Product feature: Unique blend assures a high digestibility, Contains all of the nutrients, vitamins, and minerals necessary for your dog, Great for dogs with allergies, Great for picky-eaters and can help kindle the appetite of older dogs
Product price: $39.75
Product brand: Natural Balance
Target attributes: Type
Answer: attribute: type
value: can
source: product feature
attribute: type
value: canned
source: product title
attribute: type
value: canned
source: product description