Cats Are Not Small Dogs

This is the most important concept in feline nutrition. Dogs are omnivores that can thrive on a varied diet including plant-based nutrients. Cats are obligate carnivores, meaning their bodies are designed to derive nutrition primarily from animal tissue. This distinction shapes every aspect of how you should feed your cat.

Over thousands of years of evolution as hunters, cats developed unique metabolic traits:

  • They require preformed vitamin A from animal sources. Unlike dogs and humans, cats cannot convert beta-carotene from plants into usable vitamin A.
  • They need taurine, an amino acid found naturally in meat. Taurine deficiency causes blindness, heart failure, and reproductive problems in cats. Dogs and humans can synthesize taurine from other amino acids, but cats cannot.
  • They have a high protein requirement, roughly two to three times higher than dogs on a per-kilogram body weight basis.
  • They have limited ability to process carbohydrates. Cats lack certain enzymes (such as hepatic glucokinase) that efficiently metabolize sugars and starches.
  • They require arachidonic acid, a fatty acid found only in animal fat.

Feeding a cat a diet formulated for dogs, or a vegetarian or vegan diet, will result in serious nutritional deficiencies over time.

Essential Nutrients for Cats

Protein

Protein should be the foundation of your cat’s diet. The Association of American Feed Control Officials (AAFCO) sets a minimum of 26 percent protein (dry matter basis) for adult cats, but most feline nutrition experts recommend significantly higher levels, in the range of 40 to 50 percent.

Look for named animal protein sources as the first ingredients: chicken, turkey, salmon, or beef. Avoid foods where the primary protein comes from plant sources like corn gluten meal or soy.

Fat

Fat provides concentrated energy and is essential for absorbing fat-soluble vitamins (A, D, E, and K). It also provides essential fatty acids that support skin and coat health, brain function, and inflammation control.

AAFCO recommends a minimum of 9 percent fat for adult cats. Most quality cat foods contain 15 to 20 percent fat on a dry matter basis.

Carbohydrates

Cats have no dietary requirement for carbohydrates. In the wild, a cat’s natural prey provides virtually no carbohydrate content. While cats can digest some carbohydrates, high-carb diets have been linked to obesity and may contribute to diabetes, particularly in sedentary indoor cats.

Many dry cat foods contain 30 to 50 percent carbohydrates as a structural necessity of the kibble extrusion process. This is one reason many veterinary nutritionists recommend incorporating wet food into a cat’s diet.

Water

Cats evolved as desert animals that obtained most of their moisture from prey. As a result, cats have a naturally low thirst drive and may not drink enough water to compensate for a dry-food-only diet. Chronic mild dehydration is a contributing factor in urinary tract disease and kidney problems, both of which are extremely common in cats.

Wet Food vs. Dry Food

This is one of the most debated topics in feline nutrition, and the answer is nuanced.

Wet Food (Canned or Pouch)

Advantages:

  • High moisture content (75 to 80 percent), which supports hydration and urinary health
  • Typically higher in protein and lower in carbohydrates than dry food
  • More palatable for many cats, including picky eaters
  • Closer in composition to a cat’s natural diet

Disadvantages:

  • More expensive per calorie
  • Spoils within a few hours at room temperature
  • Less convenient for free-feeding schedules
  • Requires refrigeration after opening

Dry Food (Kibble)

Advantages:

  • Convenient and shelf-stable
  • Less expensive per calorie
  • Can be left out for free-feeding without spoilage
  • Useful in puzzle feeders for mental stimulation

Disadvantages:

  • Low moisture content (about 10 percent)
  • Generally higher in carbohydrates
  • Calorie-dense, which makes overfeeding easy
  • Does not provide significant dental benefit despite common claims

Many veterinarians recommend a combination of wet and dry food. This approach captures the hydration benefits of wet food while offering the convenience of kibble. For example, you might offer wet food at scheduled meals and make a measured amount of dry food available between meals.

For cats prone to urinary issues, such as Persians and male cats in general, prioritizing wet food is particularly important for maintaining urinary tract health.

Feeding Schedules

How often and how much you feed matters as much as what you feed.

Kittens (Up to 12 Months)

Kittens have small stomachs and high energy needs. They benefit from:

  • Three to four meals per day until 6 months of age
  • Two to three meals per day from 6 to 12 months
  • Kitten-formulated food, which provides higher calories, protein, and essential nutrients for growth

Active breeds like Bengals and Siamese may need slightly more food during growth phases.

Adults (1 to 10 Years)

Most adult cats do well with:

  • Two meals per day (morning and evening) as a baseline
  • Measured portions based on the food’s calorie content and your cat’s weight
  • Adjustments based on body condition rather than following package guidelines alone (which often overestimate portions)

Seniors (11 Years and Older)

Older cats may benefit from:

  • Three to four smaller meals per day for easier digestion
  • Warming food slightly to enhance aroma (important for cats with declining sense of smell)
  • Monitoring weight closely, as both weight loss and weight gain are concerning in senior cats

Portion Control and Weight Management

Indoor cats are at high risk for obesity, which is the most common nutritional disorder in cats. An overweight cat faces increased risk of diabetes, joint disease, urinary problems, and a shorter lifespan.

How to determine the right portion:

  1. Calculate your cat’s caloric needs (your veterinarian can help with this based on ideal body weight)
  2. Check the calorie content of your cat’s food (listed on the packaging as kcal per can or per cup)
  3. Divide the daily calorie allowance by the calories per serving to determine portion size
  4. Adjust based on body condition assessments every two to four weeks

A typical healthy 4 to 5 kg (9 to 11 lb) indoor adult cat needs approximately 200 to 250 calories per day. This is often less food than owners expect.

Free Feeding vs. Scheduled Meals

  • Free feeding (leaving food available all day) works only for cats who self-regulate their intake well, which is the minority. It makes monitoring food consumption impossible and promotes overeating.
  • Scheduled meals give you control over portions and allow you to notice immediately if your cat’s appetite changes, which is often the first sign of illness.

Hydration Strategies

Given cats’ low natural thirst drive, encouraging water intake is important:

  • Multiple water stations: Place fresh water bowls in several locations throughout your home, away from food bowls and litter boxes
  • Water fountains: Many cats prefer running water. A quality pet fountain can significantly increase water consumption.
  • Wet food: The single most effective way to increase your cat’s daily water intake
  • Broth: A small amount of low-sodium, onion-free chicken broth added to water or dry food
  • Ice cubes: Some cats enjoy batting at and licking ice cubes, especially in warm weather

Foods to Avoid

Some human foods are toxic to cats:

  • Onions and garlic (all forms): Cause red blood cell damage
  • Chocolate: Contains theobromine, which is toxic to cats
  • Grapes and raisins: Can cause kidney failure
  • Alcohol: Even small amounts are dangerous
  • Xylitol (artificial sweetener): Causes rapid insulin release and liver failure
  • Raw eggs: Risk of Salmonella and biotin deficiency from avidin in raw egg whites
  • Caffeine: Toxic to cats
  • Lilies: While not a food, lily exposure (including from drinking water from a vase) causes acute kidney failure in cats

Reading Cat Food Labels

When evaluating cat food, look for:

  • AAFCO statement: Confirms the food is “complete and balanced” for the appropriate life stage
  • Named protein source as the first ingredient (e.g., “chicken” rather than “meat by-products”)
  • Species-appropriate formulation: Food specifically made for cats, not “all life stages” formulas designed primarily for dogs
  • Calorie content: Listed as kcal/kg and kcal per familiar unit (can, cup, or pouch)
  • Avoid: Foods with excessive fillers, artificial colors, or unnamed animal by-products

For more on feeding your pet well, explore our nutrition guides and check out our advice on healthy treats and puppy nutrition.