A New Cat Owner’s Guide to Feeding Your Cat

Bringing a cat home for the first time is exciting — but walking down the pet food aisle for the first time can be genuinely overwhelming. Dozens of brands, hundreds of varieties, wet food, dry food, raw food, grain-free, high-protein, senior formulas, kitten formulas… where on earth do you start?

The good news is that feeding a cat well doesn’t need to be complicated. Once you understand a few key principles, making good food choices for your new companion becomes much more straightforward. This guide covers everything a new cat owner needs to know.

Understanding What Cats Actually Need to Eat

Before looking at specific foods, it helps to understand what cats are — nutritionally speaking.

Cats are obligate carnivores. Unlike dogs or humans, they are biologically designed to get almost all of their nutrition from animal protein. Their bodies cannot produce certain essential nutrients on their own — including taurine, arachidonic acid, and vitamin A — and must obtain them from meat.

This has a very practical implication: cats need a diet that is high in animal protein and relatively low in carbohydrates. A diet that is heavy in grains, fillers, or plant-based protein is not well suited to a cat’s biology, regardless of how appealing the packaging looks.

Wet Food vs Dry Food: What’s the Difference?

This is the question almost every new cat owner asks first, and the honest answer is that both have a place — but they are not equal.

Wet Food

Wet food (also called canned food or pouches) typically contains around 70 to 80 percent moisture. This high water content is genuinely important for cats, because cats have a naturally low thirst drive. In the wild, they get most of their hydration from the prey they eat. Domestic cats fed exclusively on dry food often don’t drink enough water to compensate, which can contribute to urinary and kidney problems over time.

Wet food tends to be:

• Higher in protein
• Lower in carbohydrates
• Better for hydration
• More palatable for many cats
• Closer to a cat’s natural diet

The main downsides are cost (wet food is generally more expensive per calorie) and the fact that it needs to be refrigerated once opened and used within 24 to 48 hours.

Dry Food

Dry food (kibble) is convenient, cost-effective, and has a long shelf life. It can be left out during the day without spoiling, which suits busy owners and cats who prefer to graze rather than eat set meals.

However, dry food is typically:

• Much lower in moisture (around 10%)
• Higher in carbohydrates
• More heavily processed
• Less palatable for some cats

Dry food alone is not ideal as a cat’s sole diet, largely because of the hydration issue. If you do feed dry food, ensuring your cat has constant access to fresh water is essential — and many vets recommend a water fountain, as cats are often more attracted to moving water than a static bowl.

The Best Approach

Many cat owners and vets recommend a combination: wet food as the main part of the diet, with dry food as a supplement or for grazing between meals. This gives you the nutritional benefits of wet food while retaining some of the convenience of dry.

How to Read a Cat Food Label

You don’t need a degree in nutrition to decode a cat food label — but knowing what to look for helps enormously.

Ingredients List

Ingredients are listed in descending order by weight. The first ingredient should ideally be a named animal protein — chicken, turkey, salmon, beef, tuna. “Meat meal” or “animal derivatives” are less specific but not necessarily bad; named meals (e.g. “chicken meal”) are more transparent than vague terms.

Look for:

• Named meat or fish as the first ingredient
• A short, recognisable ingredients list
• Added taurine (essential for cats)

Be cautious of:

• Grains, corn, or wheat as primary ingredients
• Vague terms like “animal by-products” without specification
• Artificial colours, flavours, and preservatives
• High sugar content

Guaranteed Analysis

This section shows the minimum percentages of protein and fat, and the maximum percentages of fibre and moisture. For a cat food, you generally want:

• Protein: 30% or higher on a dry matter basis
• Fat: 15 to 20% on a dry matter basis
• Carbohydrates: as low as possible

AAFCO or FEDIAF Statement

In the US, look for an AAFCO (Association of American Feed Control Officials) statement confirming the food is “complete and balanced” for your cat’s life stage. In Europe, FEDIAF sets equivalent standards. This statement means the food meets minimum nutritional requirements — it’s a baseline, not a guarantee of quality, but its absence is a concern.

Kitten Food vs Adult Cat Food

If your new cat is under 12 months old, they are a kitten and need kitten-specific food. Kittens have very different nutritional requirements to adult cats:

• They need more protein and fat to support rapid growth
• They need higher levels of certain vitamins and minerals, including calcium and phosphorus for bone development
• They need more calories per kilogram of body weight

Kitten food is formulated to meet these higher demands. Feeding an adult cat food to a kitten may leave them nutritionally short during a critical growth period. Most cats transition to adult food at around 12 months, though larger breeds may benefit from staying on kitten food until 18 months.

How Much Should You Feed Your Cat?

Overfeeding is one of the most common mistakes new cat owners make, and feline obesity is a serious and widespread health problem. An overweight cat is at increased risk of diabetes, joint problems, heart disease, and a shorter lifespan.

Follow the Feeding Guidelines — But Use Common Sense

The feeding guide on your cat food packaging gives a starting point based on weight. However, these are guidelines, not rules. Individual cats vary in their metabolism, activity level, and body condition.

Body Condition Score

Rather than relying solely on weight, learn to assess your cat’s body condition. You should be able to feel (but not prominently see) your cat’s ribs with gentle pressure. Their waist should be visible when viewed from above. If you can’t feel ribs without pressing hard, your cat may be overweight. If ribs are very prominent and visible, they may be underweight.

Your vet can show you how to assess body condition and advise on the right portion size for your specific cat.

Meal Feeding vs Free Feeding

Meal feeding — providing set portions at set times — gives you control over how much your cat eats and makes it easier to monitor appetite changes (which can be an early sign of illness).

Free feeding — leaving food available at all times — suits some cats who self-regulate well, but many cats will overeat if food is constantly available. Free feeding is generally only practical with dry food, as wet food cannot be left out.

For most new cat owners, two meals a day is a sensible and manageable routine.

Foods That Are Dangerous for Cats

Some human foods are toxic to cats and should never be fed to them, even in small amounts:

• Onions and garlic — cause damage to red blood cells and can lead to anaemia
• Grapes and raisins — can cause acute kidney failure
• Chocolate — contains theobromine, which is toxic to cats
• Caffeine — toxic to cats in any form
• Alcohol — even small amounts can be dangerous
• Xylitol — an artificial sweetener found in many products, highly toxic
• Raw dough — can expand in the stomach and produce alcohol as it ferments
• Cooked bones — can splinter and cause internal injury
• Macadamia nuts — toxic to cats

If you suspect your cat has eaten any of these, contact your vet immediately.

Treats: How Much Is Too Much?

Treats are a lovely way to bond with your cat and reward good behaviour — but they should make up no more than 10 percent of your cat’s daily calorie intake. Treats are typically high in calories and low in nutritional value, and overuse can contribute to weight gain and nutritional imbalance.

Choose treats that list a named meat as the first ingredient, and avoid anything with a long list of artificial additives. Many cats are just as happy with a small piece of cooked chicken as they are with a commercial treat.

Transitioning to a New Food

If you’re changing your cat’s food — whether because you’ve brought them home and want to switch brands, or because your vet has recommended a dietary change — do it gradually.

Sudden changes in diet can cause digestive upset, including vomiting and diarrhoea. The standard approach is to mix the new food with the old, gradually increasing the proportion of new food over 7 to 10 days:

• Days 1-2: 25% new food, 75% old food
• Days 3-4: 50% new food, 50% old food
• Days 5-6: 75% new food, 25% old food
• Days 7+: 100% new food

If your cat shows signs of digestive upset at any stage, slow the transition down further.

When to Talk to Your Vet About Nutrition

Your vet is your best resource for personalised feeding advice. Consider booking a nutritional conversation if:

• Your cat is gaining or losing weight unexpectedly
• Your cat has a health condition such as kidney disease, diabetes, or urinary problems that may require a specific diet
• Your cat is a senior (typically over 7 to 10 years) and may have changing nutritional needs
• Your cat is pregnant or nursing
• You’re considering a raw or home-cooked diet and want guidance on nutritional completeness

A diet that works perfectly for one cat may not be right for another. Your vet can help you tailor feeding to your individual cat’s needs.

Final Thoughts

Feeding your cat well doesn’t require perfection — it requires a basic understanding of what cats need and a willingness to choose quality over convenience where it matters.

Prioritise animal protein, pay attention to hydration, don’t overfeed, keep dangerous foods out of reach, and transition between foods gradually. Get into these habits from the start and you’ll be giving your new companion the nutritional foundation for a long, healthy, and happy life.

When in doubt, your vet is always the best first call. They know your cat, they know nutrition, and they want the same thing you do — a thriving, healthy animal.