Complete dry food for adult cats
This aisle is complete dry food built for adult cats — one bag meant to cover everything a healthy adult cat needs, rather than a treat or a topper to go alongside something else. It's the food most owners reach for day to day because it's simple to store, doesn't spoil in a bowl left out, and tends to work out cheaper per meal than wet food.
What 'complete' means
A complete food is formulated to be fed on its own as your cat's whole diet, as opposed to a complementary food or treat that's only meant to be part of one. For a healthy adult cat with no particular medical need, a complete dry food covers what they need without extra supplementing.
That said, cats are obligate carnivores with a naturally low thirst drive, so a diet based mainly on dry food means fresh water matters more than it might for a dog — keep a bowl topped up and consider a second one in a different room if your cat doesn't drink much.
Why some owners choose dry over wet
Dry food can be left down for a cat to graze through the day without spoiling the way wet food does within an hour or two, which suits cats who prefer to eat little and often rather than in one sitting. It's also generally more cost-effective per meal and easier to store in bulk.
The trade-off is moisture content — wet food naturally contributes more to a cat's fluid intake, so if your cat is a light drinker, mixing in some wet food or using a water fountain alongside a dry diet is worth considering.
Switching between foods
Change any adult cat's food gradually over a week or so, mixing increasing amounts of the new food into the old, rather than swapping overnight. Cats can be more particular about a sudden change than dogs, and a fast switch is more likely to upset their stomach or put them off the new food altogether.
If your cat has a known sensitivity, is overweight, or is on a specific diet for a health reason, check with your vet before switching to a new complete food rather than choosing on taste or price alone.
In this section
Everything below is in stock with us, priced with delivery worked out, and packed and posted by hand in the UK.
Whiskas 1+ Salmon Adult Dry Cat Food
Complete salmon dry food for adult cats in a practical 1.9KG bag
£12.39
James Wellbeloved Grain Free Adult Dry Cat Food Turkey
A grain-free turkey dry food for adult cats, with potato rather than rice or wheat for carbohydrate
£24.65
James Wellbeloved Light Adult Dry Cat Food Fish
A lower-calorie fish dry food for adult cats managing their weight, with joint-support ingredients
£24.65
Whiskas 1+ Lamb Adult Dry Cat Food
Complete lamb dry food for adult cats in a practical 1.9KG bag
£12.39
James Wellbeloved Hairball Adult Dry Cat Food Turkey
Single-protein turkey dry food for cats, with natural fibres to reduce hairballs
£24.65
James Wellbeloved Adult Dry Cat Food Turkey
A single-source turkey dry food for adult cats, without the grain-free or joint-support extras
From£21.79
Whiskas 7+ Chicken Adult Dry Cat Food
Complete chicken dry food for senior cats aged 7+ in an 800G bag
£6.09
Whiskas 1 Tuna Adult Dry Cat Food
Complete tuna dry food for adult cats, offered in several bag sizes
From£3.19
Iams Adult Dry Cat Food Chicken
Complete chicken dry food for adult cats, available in 2KG and 10KG bags
From£12.49
Iams Adult Dry Cat Food Lamb
IAMS adult dry cat food labelled Lamb — actually chicken-led, with lamb at 4%
£12.49
Go-Cat Go Cat Herring with Vegetables Dry Cat Food
A dry cat food where herring makes up 3.2% of the recipe, in fish-shaped kibbles
From£1.35
Iams Hairball Dry Cat Food Chicken
Complete dry cat food built around a fibre blend for hairball control, wheat-free recipe
£12.50
Common questions
- What does 'complete' mean on cat food packaging?
- A complete food is nutritionally balanced to be fed as your cat's entire diet on its own, unlike a complementary food or treat which is only meant to make up part of it. Most everyday adult dry foods, including this aisle, are labelled complete for exactly this reason.
- Is dry food or wet food better for adult cats?
- Neither is simply better — both can form part of a healthy diet, and many owners feed a mix. Dry food is convenient and can be left down longer; wet food contributes more moisture, which matters for cats who don't drink much water on their own.
- How do I switch my cat to a new dry food?
- Mix the new food in gradually with the old over about a week, increasing the proportion each day rather than swapping in one go. This gives your cat's digestion time to adjust and makes an upset stomach much less likely.
- Do cats on dry food need to drink more water?
- Yes, generally. Dry food contains far less moisture than wet food, so cats fed mainly on it rely more on drinking to stay hydrated. Keep water freely available, and consider a second bowl or a fountain if your cat isn't a big drinker.
Related
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.