From Kitten to Cat: When to Switch to Adult Cat Food

Your tiny kitten is growing fast—and before you know it, they’ll be ready to step into adulthood. But when is the right time to make the switch to adult cat food, and why does it matter?

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When Do Kittens Become Adults?

Most kittens are ready to transition to adult food between 10 –12 months, once they’ve reached about 90% of their full size. One exception is the Maine Coon, which can take up to 15 months to fully mature.

Why the Switch Matters

Kitten food is packed with extra energy, protein, and nutrients to fuel rapid growth and build immunity. Once your kitten matures, their metabolism slows, and they need fewer calories. Continuing with kitten food beyond this stage could lead to obesity and related health risks like diabetes or arthritis.

Adult cat food provides:

• Balanced calories for healthy weight
• High-quality protein for muscle maintenance
• Nutrients to support digestion, skin, and coat health

How to Transition Smoothly

Cats don’t enjoy sudden changes. Switch gradually over 7 days by mixing adult food into their kitten food:

• Days 1–2: 25% adult, 75% kitten
• Days 3–4: 50% adult, 50% kitten
• Days 5–6: 75% adult, 25% kitten
• Day 7: 100% adult

If your cat has a sensitive stomach, extend the plan to 10 days.

Tailored Nutrition Matters

Every cat is unique. Their nutritional needs vary depending on breed, activity levels, and whether they’re sterilised. That’s why Royal Canin offers diets precisely tailored to your cat’s size, breed, and lifestyle—helping them thrive at every stage of life.

A smooth transition today sets the foundation for a healthier tomorrow.

Disclaimer: This blog is shared by Royal Canin for guidance and information on pet health and nutrition.