Short answer Many major cat-food brands offer formulas labelled as "complete and balanced for all life stages." That claim means the food meets the nutrient profile required for growth, reproduction and adult maintenance (so it is intended to be nutritionally adequate for kittens, pregnant/lactating queens and adult cats).

Common brands that sell (or have sold) all‑life‑stages / complete formulas

• Purina (e.g., Cat Chow, Purina ONE, Purina Pro Plan lines often include "all life stages" products)
• Hill’s Pet Nutrition (Science Diet / Hill’s tends to have complete diets — check the label for life‑stage wording)
• Royal Canin (large range; some formulas are intended as complete diets across stages — check each product)
• Iams (has offered all‑life‑stages versions)
• Nutro (has ranges that include complete/all life‑stage options)
• Champion Petfoods (Orijen / Acana) and some boutique brands sometimes offer formulas marketed as suitable for all life stages

How to be sure a product truly covers all life stages

• Look for the label text: "Complete and balanced for all life stages" or "formulated to meet the nutritional levels established for growth and reproduction" (or the equivalent national standard).
• Check that the product cites a recognized nutrient standard (e.g., AAFCO or FEDIAF statements on the bag or product page).
• For kittens, pregnant or nursing cats, choose foods explicitly labelled for growth/reproduction or "all life stages" — adult‑only diets may not be adequate.

A quick practical tip If you have a kitten, a pregnant/nursing cat, a senior cat, or a pet with health issues, ask your veterinarian which specific formula is best — "all life stages" covers general requirements but specific ages or medical needs sometimes require different nutrient balances.