How much canned food does an adult cat need per day?

Side View Of Cat Eating Food On Floor
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Question: How much food do I have to feed to meet an adult cat's daily requirements?

I've read on your site about the importance of canned food, but couldn't find anything to tell me how many cans a day I should feed my cat.

Answer: Unfortunately there is no hard and fast answer to your question. Nutritional requirements for cats vary, even for cats of the same age. Factors that may affect nutritional requirements for cat food include:

  • The Cat's Weight
    A 17-pound cat with a muscular build and large bone structure will require more calories and associated nutrients to maintain his weight than a nine-pound cat with a more slender build. Likewise, a cat who needs to gain or lose weight will need differing quantities of food.
  • The Cat's Activity Level
    Likewise, two identical 17-pound cats as described above will vary in their requirements, depending on their activity. A three-year-old cat who races around the house may require more than an eight-year-old who sleeps most of the day.
  • The Cat Food Content
    Fish flavors, in particular, should be fed in minimal amounts. Although most cats love the taste of fish, an exclusive fish diet has the potential for harm. Pet MD  says, "Cats that are fed large amounts of tuna, particularly red tuna, tend to be more prone to steatitis" This is especially true with the lower quality fish protein often used in cat food. If your cat enjoys fish, try eliminating fish-flavored cat food; instead, give him a small treat of human-quality albacore tuna occasionally.
  • Quality of the Cat Food
    As a rule, many cats fed a high-quality premium cat food will eat less than they did on poor-quality "grocery store" food. Their bodies have an innate ability to judge when they have reached the proper nutritional level, and they will stop eating when they reach that level. As a result, feeding these high-quality foods has the added result of making them actually more economical.
  • Supplemental Dry Food
    Cats that are "free-fed" with dry food in addition to their regular meals of canned food, will eat less of the canned food.

To make it easier for you, most cat food cans and packages give you feeding guidelines printed right on the package. Alternatively, you can check the websites of the food manufacturers. PetSmart has a calculator for the basic foods it sells. You can input the cat's age, weight, and activity level, and it will give you the results for your specific cat.

Generally, if your cat seems healthy and active, and is not constantly begging for food, you can assume that he is getting the proper amount of food, especially if the quality of food is superior.