Can changing food fix a constipated dog?

It can help with mild, occasional cases linked to hydration or fibre, but persistent or severe constipation needs a vet's assessment, since it can have causes a diet change will not address, such as a swallowed object or an underlying condition.

Does wet food help with dog constipation?

It can, since its higher moisture content addresses one of the more common contributing factors — mild dehydration. It is a reasonable first thing to discuss with your vet for a dog prone to occasional, mild constipation.

How do I know if it's constipation or something more serious?

Straining with no result, visible pain, vomiting, a swollen abdomen, or going more than a day or two without passing a stool are all signs to contact your vet the same day rather than waiting or trying a food change first.

Are bones a common cause of constipation in dogs?

Yes, particularly cooked bones or a large amount of bone material, which can be very difficult for a dog to pass and cause severe constipation. If you suspect your dog has eaten bones and is now straining, contact your vet rather than waiting to see if it passes.

Food for dogs with constipation

Occasional constipation in dogs is often linked to hydration and fibre intake, and simple changes such as more moisture in the diet are frequently among the first things a vet suggests trying. Persistent or severe constipation needs a vet's assessment though, since it can have causes — from a swallowed foreign object to an underlying condition — that a food change alone will not fix.

Common, simple causes worth knowing about

Mild dehydration, a recent diet change, reduced exercise, or a diet lower in fibre than a dog is used to can all contribute to occasional constipation. Older, less active dogs are somewhat more prone to it than younger, more active ones, simply through reduced gut motility.

Swallowed bones, in particular cooked bones or a large amount of raw bone, are a genuine and fairly common cause of severe constipation, since they can be very difficult for a dog to pass. If you know or suspect your dog has eaten bones and is now straining, that is worth a call to your vet rather than waiting.

What a vet usually suggests trying with food

Increasing moisture in the diet — through wet food, or adding a little water to dry food — is a common first step, since dehydration is a frequent contributor to firmer stools. An appropriate level of dietary fibre also supports normal gut movement, though the right amount varies by dog rather than being a single fixed target.

None of this replaces addressing an underlying cause if there is one. If constipation is a recurring pattern rather than a one-off, your vet will want to look at what is driving it rather than treating each episode with diet alone.

What's in the general range that fits this approach

Wet food, given its higher moisture content compared with dry kibble, is often the simplest everyday change worth discussing with your vet for a dog prone to firmer stools. Senior-formulated foods, some of which are designed with digestive support and fibre levels in mind for less active dogs, are another everyday option some owners raise with their vet for this reason.

Mixing a small amount of wet food into a dog's usual dry kibble is a common, gentle way to increase moisture without a full switch, and it is generally well tolerated by dogs used to a dry diet. Any change is still worth introducing gradually over several days rather than all at once, to avoid an unrelated stomach upset from the change itself.

When it is not a diet question anymore

Straining with little or no result, visible distress, vomiting, a swollen abdomen, or a dog who has not passed a stool in more than a day or two are all reasons to contact your vet the same day rather than trying a food change first. These can indicate something more serious than simple dietary constipation, and time matters.

A dog who has known access to bones, string, fabric or other non-food items and is now showing these signs should be treated with particular urgency, since a blockage from a swallowed object needs prompt veterinary attention rather than a wait-and-see approach at home.

Foods formulated for this

Everything below is in stock with us, priced with delivery worked out, and packed and posted by hand in the UK.

Lily's Kitchen Dog Lean Machine — 10 x 150g Trays

Sold as a case: 10 x 150g trays. Lily's Kitchen's lowest-calorie wet recipe for adult dogs, in a 150G foil

£16.89

Forthglade Complete Puppy Chicken with Liver Grain Free — 18 x 395g Trays

Sold as a case: 18 x 395g trays. A complete grain-free wet food for puppies, built on 71% chicken and 4% chicken liver

£35.89

Lily's Kitchen Lean Machine — 6 x 400g Tins

Sold as a case: 6 x 400g tins. Lily's Kitchen's lowest-calorie wet recipe for adult dogs, with turkey, squash and kale

£22.79

Lily's Kitchen Lily S Kitchen Dog Great British Breakfast

Sold as a case: see the options. Complete venison and ham wet dog food offered in two pack sizes

From£16.89

Choose options

Forthglade British Classics Chicken Family Lunch — 18 x 395g Trays

Sold as a case: 18 x 395g trays. Complete Forthglade wet dog food with 75% chicken in a 395G tray

£44.09

Harringtons Just 6 Salmon — 8 x 380g Trays

Sold as a case: 8 x 380g trays. Grain-free wet dog food built from six named ingredients, led by 70% salmon

£19.19

Lily's Kitchen Dog Recovery Recipe — 6 x 400g Tins

Sold as a case: 6 x 400g tins. Grain-free wet dog food with chicken, potato and banana, for adult dogs

£22.79

Forthglade Just 90% Multicase Grain Free 12 Pack (4xChicken, 4xlamb, 4xbeef)

Twelve trays of single-meat food, four each of chicken, lamb and beef, at 90% meat

£23.25

Aatu Dog 80 20 Chicken

A grain-free wet food with 80% chicken, sold as a complete meal or a topper

From£19.49

Choose options

James Wellbeloved Grain Free Adult Wet Dog Food Turkey, Lamb & Chicken in Loaf 12 Pack

Grain-free wet dog food tins, a 12-tin multipack across three loaf flavours

£36.39

Forthglade Complete Grain Free Beef & Sweet Potato Adult — 18 x 395g Trays

Sold as a case: 18 x 395g trays. A grain-free complete tray with beef named at 75%, well above the usual named-meat share

£35.89

Champion Professional Adult Working Dog Beef & Chicken 12 Pack

Twelve 400g cans of complete meaty chunks in jelly for adult working dogs.

£11.99

Browse all of Dogs →

Common questions

Can changing food fix a constipated dog?: It can help with mild, occasional cases linked to hydration or fibre, but persistent or severe constipation needs a vet's assessment, since it can have causes a diet change will not address, such as a swallowed object or an underlying condition.
Does wet food help with dog constipation?: It can, since its higher moisture content addresses one of the more common contributing factors — mild dehydration. It is a reasonable first thing to discuss with your vet for a dog prone to occasional, mild constipation.
How do I know if it's constipation or something more serious?: Straining with no result, visible pain, vomiting, a swollen abdomen, or going more than a day or two without passing a stool are all signs to contact your vet the same day rather than waiting or trying a food change first.
Are bones a common cause of constipation in dogs?: Yes, particularly cooked bones or a large amount of bone material, which can be very difficult for a dog to pass and cause severe constipation. If you suspect your dog has eaten bones and is now straining, contact your vet rather than waiting to see if it passes.

Sources

Written against guidance published by UK veterinary and welfare organisations. Always confirm specifics with your own vet.

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.