Is Whiskas good for dogs?
No, Whiskas is not a suitable food for dogs to eat regularly. It is formulated specifically for cats' nutritional needs, which differ from a dog's in several important ways, and feeding it as a dog's main diet risks an imbalance over time. A dog stealing a mouthful once is very unlikely to cause harm, but it should not become a habit.
Why cat food and dog food are not interchangeable
Cats need taurine, an amino acid they cannot produce enough of themselves, so cat food is fortified with it specifically. Dogs make their own taurine and do not need it added the same way, which is one clear example of why the two diets are built differently rather than one simply being a richer version of the other.
Cat food is also generally higher in protein and fat than dog food, reflecting a cat's needs as an obligate carnivore. Fed to a dog regularly, that extra richness can contribute to weight gain and an unbalanced diet over time, even though none of it is dangerous in a single serving.
What happens if a dog eats it occasionally
A dog who steals a mouthful of Whiskas from the cat's bowl now and then is very unlikely to come to any harm. It is not toxic, and one incident is not a reason to panic, though it is worth keeping the cat's food somewhere the dog genuinely cannot reach if it keeps happening.
The concern is with a regular pattern rather than a one-off. A dog eating cat food as a habitual extra, on top of or instead of their own complete diet, is the scenario that can lead to excess weight and a diet that is not properly balanced for a dog's needs.
What to feed instead
A complete dog food, matched to your dog's age and size, gives them everything Whiskas is not designed to provide. If your dog is repeatedly going for the cat's bowl, that is often more about access and mealtime routine than a genuine preference worth accommodating.
If your dog is repeatedly going for the cat's bowl out of genuine hunger rather than simple curiosity, it is worth checking their own portions are matched properly to their size and activity level, since a dog who is not getting enough at their own mealtimes is more likely to go looking elsewhere for it.
From this brand
Everything below is in stock with us, priced with delivery worked out, and packed and posted by hand in the UK.
Alpha Sensitive Salmon & Rice
A salmon and rice dry food for adult dogs with sensitive digestions, made without wheat gluten, soya or dairy.
£49.00
Alpha Working Dog Maintenance Chicken
An energy-controlled chicken dry food for working dogs with lower energy needs or a tendency to put on weight.
£29.00
James Wellbeloved Grain Free Senior Dry Dog Food Turkey & Veg
Grain-free turkey kibble for senior dogs, with glucosamine and chondroitin for joints
£82.35
Harringtons Just 6 Dry Dog Food Lamb
Grain-free lamb dry dog food in 2KG and 12KG sizes, with size-specific formulas
From£13.99
Forthglade Complete Meal Lightly Baked Chicken
A grain-free complete dry food for adult dogs, lightly baked and built on 50% chicken
From£12.49
Bakers Superfoods Chicken with Vegetables Dry Dog Food
Bakers Chicken with Vegetables dry dog food, 14kg, complete nutrition for adult dogs
£39.15
Harringtons Adult Dog Salmon & Potato
Complete salmon and potato dry dog food with 21% protein in a 1.7KG bag
£6.25
Forthglade Cold Pressed Grain Free Chicken
Cold-pressed grain-free chicken food with fruit and botanicals, in three bag sizes
From£16.99
Burgess Supadog Adult Complete Dog Active
Complete dry food for active adult dogs, built around poultry meal and calcium for bone health
£29.15
James Wellbeloved Grain Free Adult Dry Dog Food Turkey Veg
Grain-free turkey kibble for adult dogs, evenly balanced with potato in the mix
From£12.75
James Wellbeloved Adult Breed Dry Dog Food Turkey Rice
A hypoallergenic dry food for adult dogs, in small and large breed versions, built around single-source turkey protein
From£45.75
Common questions
- Will Whiskas harm my dog if they eat it once?
- A single mouthful from the cat's bowl is very unlikely to cause any harm to a healthy dog. It is not toxic, though a very rich or unfamiliar food occasionally causes a mild stomach upset in a sensitive dog.
- Why does my dog prefer the cat's food?
- Cat food is often more strongly flavoured and higher in fat than dog food, which many dogs find more appealing. That preference does not mean it is a better diet for them, only that it tastes richer in the moment.
- How can I stop my dog eating the cat's food?
- Feed the cat somewhere the dog cannot reach, such as up on a surface or behind a cat flap fitted into an interior door, and pick up any leftover cat food promptly rather than leaving a bowl out between meals.
- Is it the other way round too, can cats eat dog food?
- Regularly, no. Dog food does not contain the taurine level a cat needs, so a cat fed dog food as a main diet over time can become deficient in it, which is a genuinely serious problem for a cat rather than a minor issue.
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Written by Matt Garnett, who runs Giddy Pets and is a lifelong pet owner — not a vet. This is general information, not veterinary advice, and it cannot replace an examination by the vet who knows your animal. How we write these guides.