Can cats eat Cat milk / milk replacer?
Yes. Cat milk replacers (Whiskas Catmilk, Lactol Kitten Milk, Royal Canin Babycat Milk) are lactose-reduced or lactose-free and safe for cats as an occasional treat. Not the same as cow's milk.
What's the full picture?
Commercial cat milk has had most of the lactose removed, so cats that would react badly to regular milk tolerate it well. It's sold in cartons alongside cow's milk in UK supermarkets.
Kitten milk replacer (Lactol, Cimicat, Royal Canin Babycat Milk) is specifically formulated to replace mother's milk for orphaned kittens. Ratios and prep instructions vary — follow the packet.
Adult cats don't need cat milk, and it's higher-calorie than suggested on packaging — factor it into daily calorie count if feeding regularly.
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About this guidance
Every entry on this site is compiled from published UK veterinary toxicology sources — International Cat Care, Veterinary Poisons Information Service (VPIS) references, RCVS-registered practice materials, and peer-reviewed feline medicine literature. Where the evidence is mixed, we err on the cautious side because cats are unusually sensitive to many common substances that are harmless to humans and even to dogs.
This is general information written for UK cat owners. It is not personalised veterinary advice for your specific cat, their age, weight, medical history, or the exact exposure you're dealing with. If your cat has eaten something or is unwell, call your vet first. The Animal PoisonLine on 01202 509000 is available 24/7 for a small fee and can tell you whether an emergency visit is needed.
Entries are reviewed and updated as new research emerges. Spotted an error? Let us know — corrections are investigated and applied within 24 hours. For more context on how we work, see about and our full disclaimer.
Last reviewed: · By the What Can My Cat Eat? editorial team