What to feed a dog with heart disease
A dog diagnosed with heart disease is normally moved onto a diet chosen and monitored by a vet, often with a lower sodium content than a standard adult food, because managing sodium is one of the more consistent parts of supporting a heart condition. This is not something to work out alone from a food label — the specific diet, and any medication alongside it, needs to come from the vet managing your dog's case.
Why sodium comes up so often with heart disease
A failing or strained heart struggles more with the fluid retention that a higher-sodium diet can encourage, which is why many prescription and vet-recommended diets for heart conditions are formulated with reduced sodium compared with a standard complete food. This is one part of managing the condition, not a treatment in itself, and it works alongside whatever medication your vet prescribes.
Some everyday treats, table scraps and processed human foods are considerably higher in sodium than most owners realise, so cutting these out is often one of the more practical changes alongside any prescribed diet change, particularly for a dog whose heart condition is already established.
Weight also matters here in both directions: a dog carrying extra weight puts more demand on an already strained heart, while unplanned weight loss can be a sign the condition is progressing. Your vet will usually want to track your dog's weight at regular check-ups as part of managing the condition, rather than leaving it to guesswork at home.
Why this has to be led by a vet, not a label
Heart disease covers a range of different conditions with different severities, and the right diet, along with any medication, depends entirely on your individual dog's diagnosis and how their heart is currently functioning. A vet, sometimes alongside a veterinary cardiologist for more complex cases, is the only one who can set the right course for your dog.
Prescription cardiac diets, available through a vet, are specifically formulated for this purpose and are generally a more reliable route than trying to piece together a suitable diet from an ordinary shelf food. Never change or stop a prescribed diet or medication without checking with the vet managing the case first.
Signs to watch for and when to contact a vet
A dog with diagnosed heart disease who develops a new or worsening cough, seems more tired than usual, is breathing faster or with more effort, or has a swollen abdomen should be seen promptly, since these can signal the condition progressing. These are not signs to manage with a diet change alone.
If your dog has not yet been diagnosed but you have noticed any of these signs, or a reduced appetite and general low energy, contact your vet rather than adjusting their food on your own first — heart disease needs a proper diagnosis before any dietary change makes sense.
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.
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
James Wellbeloved Senior Breed Dry Dog Food Turkey Rice
Turkey and rice kibble for senior small-breed dogs, sized for smaller mouths
From£11.69
Barking Heads All Hound Golden Years Chicken
Barking Heads' senior chicken recipe for older dogs, with joint-support additions
£14.99
Bakers 7+ Senior Dog Superfood Chicken with Vegetables
A complete dry food for dogs aged 7 and over, with meaty chunks and wholegrains
£39.15
James Wellbeloved Senior Dry Dog Food Turkey & Rice
Hypoallergenic senior dog food with turkey as the single named animal protein
£69.75
James Wellbeloved Grain Free Senior Dry Dog Food Lamb Veg
Grain-free lamb kibble for senior dogs, with glucosamine and chondroitin for joints
From£12.75
Burns Adult/Senior Dog Original Lamb and Brown Rice
Single-source lamb and brown rice, formulated for adult and senior dogs with sensitivities
£35.99
Harringtons Senior Dog Chicken
Complete senior chicken dry dog food with 7.5% fat in 1.7kg and 12kg bags
From£6.49
Burns Senior Chicken Rice
Chicken and brown rice with glucosamine and chondroitin, for senior dogs slowing down
From£14.99
Forthglade Complete Senior Lamb Grain Free — 18 x 395g Trays
Sold as a case: 18 x 395g trays. A 60% lamb complete wet dog food for seniors, with glucosamine and chondroitin
£35.89
Taylors Adult & Senior Working Dog Grain Free Chicken
Grain-free complete food for working dogs, chicken-based, in a 12kg sack
£39.99
Common questions
- Can diet cure a dog's heart disease?
- No, diet does not cure heart disease. A vet-guided diet, usually lower in sodium, supports the management of the condition alongside any prescribed medication, but it is one part of a wider treatment plan rather than a treatment on its own.
- Should I put my dog on a low-sodium diet without a vet's advice?
- It is best not to change your dog's diet on your own for a suspected heart condition. A vet needs to diagnose the specific issue first, since the right diet and any medication depend on your dog's individual diagnosis rather than a general rule.
- Are there prescription foods for dogs with heart disease?
- Yes, prescription cardiac diets are available through vets and are specifically formulated to support dogs with heart conditions, generally with reduced sodium. Your vet can advise whether one is appropriate for your dog's specific diagnosis.
- What symptoms suggest a dog's heart condition is getting worse?
- A new or worsening cough, faster or more laboured breathing, unusual tiredness, or a swollen abdomen are all reasons to contact your vet promptly. These signs need a vet's assessment rather than a change to food or routine at home.
- Can I give my dog supplements for heart health without asking a vet?
- It is best not to add any supplement on your own, since some can interact with heart medication or affect how a prescribed diet works. Always check with the vet managing your dog's case before introducing anything new alongside their treatment.
Related
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.