Senior Dog Nutrition: A Practical Guide to Feeding Your Older Dog

Updated August 2026

As dogs get older, what suits them nutritionally can change.

Some senior dogs become less active and start gaining weight. Others gradually lose weight or muscle. Dental problems can make eating uncomfortable, while health conditions may mean that a previously suitable diet needs reviewing.

That does not mean every older dog automatically needs a low-fat food, a supplement cupboard or a bag labelled “senior”.

The important thing is to feed the dog in front of you.

This guide explains what I would pay attention to as your dog gets older, including weight, muscle condition, portion sizes, treats, appetite, dental comfort and when it is time to involve your vet.

Affiliate disclosure: This guide contains a small number of affiliate links. If you buy something through one of these links, I may receive a commission at no extra cost to you. I only include products where they have a genuine practical use. As an Amazon Associate, I earn from qualifying purchases.

Senior dog nutrition at a glance

• There is no single diet that is right for every senior dog.
• Healthy weight and muscle condition matter as much as the number on the scales.
• Older dogs still need good-quality, appropriate protein unless a veterinary condition requires something different.
• Treats, chews and food used for enrichment all contribute to your dog’s daily calorie intake.
• Unexplained weight loss, weight gain, appetite changes or difficulty eating should be discussed with your vet.
• Dogs with kidney disease, heart disease, diabetes, pancreatitis or other medical conditions may need individual veterinary dietary advice.

When does a dog need a senior diet?

There is no exact birthday when every dog suddenly needs different food.

Dogs age at different rates. Breed, size, activity, health, genetics and previous medical conditions all play a part.

You will often see commercial foods labelled for dogs aged seven years and over, but the age printed on a packet should not be the only reason you change your dog’s diet.

A healthy eight-year-old dog who is active, maintaining good body condition and doing well on an appropriate complete adult diet may have very different needs from another eight-year-old dog who has arthritis, dental problems and is losing muscle.

The WSAVA Global Nutrition Guidelines emphasise assessing nutrition around the individual animal rather than relying on one rule for every dog.

That is the approach I think makes most sense.

Review the food as your dog ages, but do not change it simply because they have reached a particular number.

What should you look for in senior dog food?

For most healthy older dogs, the starting point is a nutritionally complete food that suits their health, activity and body condition.

Look at the packaging carefully.

In the UK, there is an important distinction between food described as complete and food described as complementary.

A complete food is designed to provide the nutrients your dog needs when fed according to its instructions.

Complementary food is designed to be fed alongside something else and should not normally form your dog’s entire diet.

The UK Pet Food guidance on feeding dogs through different life stages provides further useful information about feeding as dogs age.

When considering a food, I would pay attention to:

• whether it is complete
• whether it suits your dog’s life stage
• how many calories it provides
• how much you actually need to feed
• whether your dog enjoys eating it
• whether they can comfortably chew it
• how their weight responds
• whether their stools remain normal
• any existing medical conditions
• advice from your veterinary team

Do not judge a dog food purely from the front of the packet.

Words such as premium, natural, holistic or senior can sound reassuring, but they do not tell you whether that particular diet is right for your dog.

Does an older dog need less protein?

Not automatically.

This is an area where older advice can be misleading.

Muscle loss is something worth watching closely in ageing dogs. Protein provides amino acids that help the body maintain muscle and other tissues.

The PDSA guide to feeding senior pets notes the importance of high-quality protein in senior diets.

That does not mean simply choosing the food with the biggest protein percentage on the packet.

It means avoiding the assumption that protein should automatically be restricted simply because a dog is old.

Some diagnosed medical conditions can require specific changes to protein, phosphorus or other nutrients. Those decisions belong with your vet rather than an online article or pet-food advert.

Weight matters, but so does muscle

One of the most useful things you can do for an older dog is monitor changes over time.

Do not rely only on the number displayed on the veterinary scales.

A senior dog can lose muscle while gaining fat, which means their total weight may appear surprisingly stable.

The WSAVA distinguishes between body condition and muscle condition because they tell you different things.

Body condition helps assess body fat.

Muscle condition looks at loss of muscle, which can occur with ageing and disease.

You can find WSAVA’s nutritional assessment resources and body-condition guidance here.

At home, pay attention to:

• whether your dog’s ribs feel noticeably different
• whether their waist is changing
• whether their spine or hips seem more prominent
• whether their thighs appear thinner
• whether they are losing strength
• whether collars or harnesses fit differently
• whether their weight is steadily rising or falling

Small changes are much easier to miss when you see your dog every day.

Taking an occasional photograph from above and from the side can make gradual changes easier to spot.

Weight gain in older dogs

Some senior dogs gradually become less active.

Perhaps walks become shorter. They may run less, sleep more or spend fewer hours moving around the house.

If food portions remain exactly the same, weight can begin creeping upwards.

Excess weight can make movement harder, particularly for a dog already dealing with stiff or painful joints.

PDSA recommends monitoring senior pets’ weight and adjusting feeding and activity around the individual animal rather than allowing gradual weight gain to become accepted as part of old age.

You can read their senior pet feeding and weight guidance for more detail.

If your dog starts gaining weight:

1. Measure what you actually feed.
2. Include treats, chews and food used for training.
3. Check whether anyone else in the household is feeding extras.
4. Compare their current activity with six or twelve months ago.
5. Speak to your veterinary team before making a significant calorie reduction.

Do not simply halve the dog’s food.

Reducing a complete diet too far can also reduce the nutrients your dog receives.

Weight loss can matter even more

An older dog becoming thinner should not automatically be celebrated.

Unplanned weight loss deserves attention, particularly when it happens alongside:

• reduced appetite
• increased thirst
• increased hunger
• vomiting
• diarrhoea
• difficulty chewing
• coughing
• weakness
• muscle loss
• behavioural change
• changes in toileting

The BSAVA Ageing Canine Toolkit specifically encourages owners to monitor changes, including weight, dental health, mobility, and behaviour, rather than dismissing them as “just old age”.

If your older dog is unexpectedly losing weight, speak to your vet rather than simply increasing the food and hoping the problem disappears.

How much should you feed a senior dog?

The feeding guide on the packet is a useful starting point.

It is not a precise prescription for every dog.

Two dogs of the same weight can need different amounts because of differences in:

• activity
• metabolism
• neuter status
• age
• breed
• body condition
• health
• environmental temperature

I prefer weighing food rather than judging portions by eye.

A scoop can look remarkably consistent while gradually getting fuller.

Kitchen scales make it much easier to know what the dog is genuinely eating.

If your dog eats 220g per day, for example, you can measure 220g rather than relying on a cup, mug or handful.

Then monitor the dog.

If their weight or body condition begins changing, speak to your vet or veterinary nurse about whether the amount needs adjusting.

Do senior dogs need fewer calories?

Some do.

Some do not.

A dog who has slowed considerably may need fewer calories than they did as a younger adult.

Another senior dog may still be extremely active.

An older dog who is underweight or losing muscle may need a completely different approach.

This is another reason why “senior means fewer calories” is too simplistic.

Use your dog’s body condition, activity and health as your guide.

Should you switch to senior dog food?

A well-formulated senior food can be useful.

Depending on the product, senior diets may be designed with changes to calorie density, digestibility, fibre, or other nutrients intended to suit ageing dogs.

PDSA explains some of these common differences in its guide to senior pet food.

However, the word “senior” is not enough on its own.

Before changing food, ask:

• Is my dog currently maintaining a healthy weight?
• Are they maintaining muscle?
• Do they enjoy their food?
• Can they chew it comfortably?
• Are their stools normal?
• Do they have a diagnosed health condition?
• Has my vet suggested changing their diet?

If the current diet is working well, there may not be an urgent reason to replace it.

Change food gradually

Older digestive systems do not necessarily appreciate a sudden menu change.

If you are moving from one suitable diet to another, change it gradually unless your vet gives different instructions.

PDSA suggests introducing a new diet over roughly seven to ten days.

You might gradually increase the proportion of new food while decreasing the old food.

If your dog develops vomiting, diarrhoea, marked loss of appetite or another concerning change, contact your vet.

Dogs with medical conditions may need a different transition plan.

Wet food or dry food for senior dogs?

Neither is automatically better.

Both wet and dry complete foods can provide appropriate nutrition when correctly formulated and fed in appropriate amounts.

What matters is what suits your dog.

Wet food can be useful for some dogs because it:

• contains more moisture
• can be easier to eat
• may smell more appealing
• can suit dogs with some dental difficulties

Dry food can be convenient to:

• measure
• store
• use for training
• place in food toys or simple sniffing games

Some dogs eat a combination.

If your senior dog has kidney disease, urinary problems, dental disease or another diagnosed condition, ask your vet what form of food is most appropriate.

Dental problems can change how a dog eats

Do not assume that an older dog who becomes fussy has simply become awkward.

Eating may hurt.

Watch for:

• dropping food
• chewing on one side
• taking much longer to eat
• approaching food and walking away
• refusing harder food
• bad breath
• bleeding gums
• pawing at the mouth
• suddenly preferring soft food

PDSA advises veterinary assessment when senior pets show signs such as bad breath, bleeding gums, difficulty chewing or dropping food.

Changing the texture may temporarily make eating easier, but it does not treat dental disease.

Your vet needs to investigate the cause.

Appetite changes deserve attention

Owners often know very quickly when a food-loving dog suddenly behaves differently around dinner.

An occasional off meal may have a simple explanation.

Persistent appetite changes need more attention in a senior dog.

Speak to your vet if your dog:

• repeatedly refuses meals
• suddenly becomes ravenously hungry
• loses interest in a previously enjoyed diet
• begins drinking much more
• loses weight
• vomits repeatedly
• has persistent diarrhoea
• appears uncomfortable while eating

Do not continually add richer and richer foods simply to persuade a dog to eat without finding out why their appetite has changed.

What about treats?

Treat calories count.

This becomes especially important for older dogs who exercise less than they did previously.

WSAVA recommends that treats make up less than 10 per cent of a dog’s daily calorie intake.

PDSA gives similar guidance and suggests that one easy approach is to reserve part of the dog’s normal food allowance for rewards.

You can read PDSA’s guidance on treating your dog without overfeeding.

I often like this approach because the dog still gets plenty of opportunities to find, sniff for or earn little pieces of food without those rewards being completely invisible calories.

Use part of the meal for enrichment

Feeding does not always have to mean putting the entire meal into a bowl.

If your dog enjoys enrichment and can use it comfortably, part of their normal meal can be used for:

• a simple food search
• gentle scatter feeding
• a snuffle mat
• an easy food-stuffable toy
• a lick mat
• reward-based training

For senior dogs, I keep these activities physically easy.

The dog should not have to scramble across slippery floors, repeatedly lie down and stand up or struggle with an impossibly difficult puzzle.

My gentle brain games for senior dogs and dogs on restricted exercise explain how I adapt enrichment around mobility.

A simple LickiMat can be useful for a portion of suitable wet food, provided your dog can use it safely, and the food forms part of their normal allowance.

A washable snuffle mat can also work for dogs who enjoy searching for dry food without energetic movement.

These are affiliate links.

Supervise your dog and stop using any enrichment item they try to tear apart or swallow.

Treats used for medication still count

A small piece of food used to hide a tablet may seem insignificant.

If your dog takes medication several times a day, those small additions can become meaningful.

That does not mean you should make medication difficult to give.

It simply means including those foods when thinking about the complete daily diet.

If your dog is on a veterinary prescription diet, ask whether the food you use for tablets is compatible with that diet.

Should senior dogs eat several smaller meals?

Some older dogs appear more comfortable eating smaller meals divided through the day.

There is no rule that every senior dog must switch to three or four meals.

If your dog has happily eaten twice daily for years and continues to do well, there may be no reason to change.

Smaller meals may be useful if:

• appetite is reduced
• a large meal seems uncomfortable
• medication needs to be given with food
• your vet has recommended a particular feeding schedule

Dogs with conditions such as diabetes need feeding coordinated carefully with veterinary treatment.

Follow your veterinary instructions rather than changing meal timing yourself.

Should you raise an older dog’s food bowl?

Raised bowls are often recommended online for arthritis.

They are not automatically appropriate for every dog.

If your dog clearly struggles to lower their head, discuss positioning with your vet or veterinary physiotherapist.

Sometimes changing where the bowl sits or using a secure non-slip mat is enough.

The key question is whether your dog can eat comfortably and safely.

Do not create an awkward feeding posture simply because a product is marketed for senior dogs.

Water matters too

Older dogs should always have easy access to fresh drinking water.

Think about accessibility as well as availability.

A dog with painful joints should not have to repeatedly climb stairs or cross a slippery kitchen just to reach a bowl.

You may find it helpful to provide water in more than one part of the home.

An increase in drinking can also be medically significant.

If your dog suddenly starts emptying the water bowl far more quickly than usual, tell your vet.

Supplements for senior dogs

This is one area where I would resist buying first and asking questions afterwards.

There are supplements marketed for:

• joints
• digestion
• coat condition
• cognitive ageing
• general vitality
• immunity

That does not mean every older dog needs them.

Supplements can add calories, duplicate nutrients already present in the diet or be unsuitable alongside particular illnesses or medications.

If your dog has arthritis or another diagnosed condition, discuss supplements with your vet.

I deliberately do not recommend a generic senior joint supplement on this page.

Your dog’s veterinary team is better placed to advise what, if anything, is appropriate.

What if your dog has kidney disease?

Do not use general senior-dog feeding advice to manage diagnosed kidney disease.

Dogs with renal disease may need carefully controlled nutrition designed around their particular condition and test results.

The same applies to many other diseases.

If your vet prescribes a therapeutic diet, follow their instructions and ask before adding:

• supplements
• treats
• chews
• toppers
• homemade extras
• food used to conceal medication

Even apparently small additions can matter when a diet has been designed for a medical reason.

Heart disease and diet

The old version of this article suggested that senior dogs broadly needed low-fat food to prevent heart disease.

I would not make that recommendation now.

Heart disease covers different conditions and individual dogs can have very different nutritional requirements.

If your dog has diagnosed heart disease, ask your vet what dietary changes are appropriate for that particular diagnosis.

Do not put every senior dog onto a low-fat diet simply because they are old.

Diabetes and senior dog feeding

Diabetes requires veterinary management.

The food, portion, feeding time and medication may all need to work together.

If your dog has diabetes, follow the specific feeding plan supplied by your vet.

Do not change food, meal timing or treat quantities significantly without discussing it with them.

Pancreatitis and other digestive conditions

A history of pancreatitis or chronic digestive problems is another reason not to rely on generic senior-food advice.

Some dogs require specifically formulated diets.

Others may have individual triggers or concurrent health conditions.

If your dog has previously had pancreatitis, gastrointestinal disease or recurrent digestive problems, ask your vet before introducing new treats, chews or rich foods.

Human food and leftovers

A little piece of something from your plate can become a significant extra for a smaller or less active dog.

There are also human foods that are unsafe for dogs.

I would avoid getting into the habit of routinely adding leftovers simply because an older dog has learned to wait hopefully beside the table.

If you want to add something to encourage appetite, particularly when the dog has a health condition, ask your veterinary practice first.

More exciting food can sometimes mask an underlying appetite problem rather than solve it.

My Dog First Aid and Health Guide covers common food hazards and other situations where veterinary advice may be needed.

What I watch for when caring for older dogs

When I am caring for an older dog, food is part of the wider picture rather than something I look at in isolation.

I notice whether the dog approaches their food normally.

I notice whether they hesitate before lowering their head.

I notice whether food gets left behind when that would be unusual for them.

I notice whether they seem thirstier.

I also notice whether their harness appears looser, whether their shape seems to be changing and whether they are moving differently on walks.

I am not diagnosing the reason.

My job is to notice changes and tell the owner.

With senior dogs in particular, the small changes can sometimes be the useful ones.

Nutrition and exercise need to work together

Feeding and exercise are connected.

If an older dog is doing less, their calorie needs may change.

At the same time, simply reducing food without thinking about muscle maintenance and suitable activity is not the complete answer.

My Senior Dog Exercise and Enrichment Guide explains how I adapt activity around the individual dog.

For the broader picture, including mobility, health changes, home adaptations and everyday care, start with my Senior Dog Care Hub.

Pain can affect eating and weight

Pain does not only affect walking.

A dog with discomfort may:

• struggle to stand at the bowl
• find lowering their neck uncomfortable
• move less and gain weight
• lose interest in food
• become less willing to move after meals
• appear restless or unsettled

If your dog’s movement has changed alongside their eating habits, my guide to helping pets when movement causes pain explains other signs to notice.

Persistent or sudden changes need veterinary assessment.

Feeding an older dog while you are away

Senior dogs often benefit from keeping their normal routine when their owner goes away.

If someone is caring for your dog, leave clear written instructions covering:

• exact food
• amount per meal
• meal times
• treats
• medication
• foods that must not be given
• where food is stored
• normal appetite
• usual drinking habits
• veterinary contact details

Avoid leaving instructions such as “about half a bowl”.

Measure it.

If the sitter needs to know 120g of food is given at breakfast and another 120g at dinner, write exactly that.

My house-sitting service in Finchley and North London is designed around maintaining familiar routines, which can be particularly useful for older dogs.

When a dog walker should know about your dog’s diet

Tell your dog walker if your dog:

• has food allergies
• is on a prescription diet
• has diabetes
• needs medication with food
• has a history of pancreatitis
• must not receive treats
• needs food after exercise
• has difficulty chewing
• has recently lost or gained weight

Do not worry about sounding overprotective.

That information helps me care for the dog properly.

For older dogs who benefit from an individual pace, you can also read about my dog walks for older dogs.

A simple senior dog feeding routine

For a healthy older dog, a sensible everyday routine might look something like this:

Measure the day’s food

Know roughly how much is being fed rather than repeatedly topping up a bowl.

Reserve part for treats if appropriate

If you use food for training or enrichment, take some from the daily portion.

Keep fresh water easily accessible

Consider additional bowls if mobility makes getting around difficult.

Watch your dog eat

You do not need to stare at every mouthful, but notice meaningful changes.

Keep treats modest

Remember that chews, biscuits, dental products and food used for medication all count.

Monitor body condition

Do not rely exclusively on body weight.

Review changes

If your dog’s weight, appetite, thirst or ability to eat changes, speak to your vet.

Common senior dog feeding mistakes

Assuming every older dog needs less food

Activity and health vary enormously.

Assuming senior automatically means low protein

Muscle maintenance remains important. Medical protein restriction should be based on veterinary advice.

Changing food because the packet says 7+

Age alone does not tell you everything about your dog’s nutritional needs.

Giving too many “healthy” treats

A treat still contributes calories even when its packaging looks wholesome.

Adding supplements without discussing them

More is not automatically better.

Ignoring unexplained weight loss

Weight loss in an elderly dog deserves investigation.

Blaming fussiness on old age

Dental disease, pain, nausea and illness can all change appetite.

Measuring portions by eye

Small daily differences can add up surprisingly quickly.

Forgetting food used for enrichment

A stuffed toy or snuffle mat is still food.

Trying to solve a medical problem with internet diet advice

Nutrition can form part of veterinary treatment, but that treatment must be designed for the individual dog.

Senior dog nutrition checklist

Every few weeks, ask yourself:

• Is my dog maintaining a sensible body condition?
• Does their muscle condition appear to have changed?
• Has their appetite changed?
• Are they drinking more?
• Can they chew comfortably?
• Are meals taking longer?
• Are they dropping food?
• Have activity levels changed?
• Am I measuring their food?
• How many treats and chews are they receiving?
• Has their medication changed?
• Have they developed a new health condition?
• Does their current food still appear to suit them?

If something has changed, write it down.

A simple record can make discussions with your veterinary team much more useful.

Related senior dog guides

For wider advice about caring for an ageing dog, read my Senior Dog Care: A Complete Guide to Supporting Your Older Dog.

If your dog is becoming less active, see Senior Dog Exercise and Enrichment.

For dogs on restricted activity, try Gentle Brain Games for Senior Dogs and Dogs on Restricted Exercise.

If movement is becoming uncomfortable, read Helping Your Pet When Movement Causes Pain.

For local one-to-one support, see Dog Walks for Older Dogs.

For wider health and emergency information, visit my Dog First Aid and Health Guide.

Frequently asked questions about feeding senior dogs

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What is the best food for a senior dog?

There is no single best senior dog food. The right diet depends on your dog’s health, body condition, activity, ability to chew and any veterinary conditions. Start with an appropriate nutritionally complete food and discuss significant changes with your vet.

Should every dog switch to senior food at seven?

No single age works for every dog. Seven is commonly used on commercial products, but dogs age differently. Review your dog’s diet as they get older rather than automatically changing it on their seventh birthday.

Should senior dogs eat less protein?

Not simply because they are older. Maintaining muscle is important in senior dogs. Certain diseases may require specially formulated diets, but protein restriction should not be applied to every ageing dog without veterinary advice.

Should old dogs eat less food?

A less active dog may need fewer calories, but not every senior dog does. Some older dogs lose weight or muscle and may need a different approach. Monitor their body condition rather than automatically reducing portions.

How many treats can a senior dog have?

Treats should generally make up no more than around 10 per cent of daily calories. For some dogs, particularly those on prescription diets, your vet may recommend something different.

Is wet food better for older dogs?

Not automatically. Wet food may be easier for some dogs to eat and provides additional moisture, while suitable dry food can also provide complete nutrition. Choose according to your dog’s needs.

Why has my senior dog suddenly become fussy?

Dental pain, nausea, illness, medication, reduced sense of smell and other problems can affect appetite. Persistent or sudden changes should be discussed with your vet.

Can I add chicken to encourage my old dog to eat?

A small amount may be suitable for some healthy dogs, but regularly adding extras can change the balance and calorie content of the diet. If your older dog’s appetite has changed, finding out why is more important than continually making the food richer.

Does my senior dog need joint supplements?

Not necessarily. Speak to your vet before starting supplements, especially if your dog takes medication or has other health conditions.

How do I know whether my senior dog is too thin?

Your vet or veterinary nurse can assess both body condition and muscle condition. Visible or easily felt changes around the ribs, spine, hips and thighs can also be useful signs to monitor.

Calm, individual care for older dogs in Finchley

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Nutrition is only one part of caring for an older dog.

Their walks may need to slow down. Their normal route may need shortening. They might need more time to sniff, more frequent toilet breaks or simply someone who notices that today feels different from yesterday.

I provide calm, one-to-one dog walking and in-home pet care around Finchley, Muswell Hill and selected nearby areas.

There are no group walks, vans or collection rounds.

For senior dogs, that means I can adapt the visit around the individual dog rather than asking them to keep up with somebody else’s routine.

If you would like to discuss suitable support for your older dog, use my contact page and tell me a little about their age, normal routine, mobility and postcode.

Final thoughts

Feeding a senior dog well is less about finding a bag with the word “senior” printed across the front and more about paying attention.

Watch their weight.

Watch their muscle.

Notice whether eating is comfortable.

Measure what goes into the bowl.

Count the extras.

Keep an eye on appetite and thirst.

Most importantly, do not dismiss changes simply because your dog is getting older.

A good diet should support the individual dog you have today, alongside appropriate veterinary care, comfortable exercise and a routine that changes as their needs change.

Veterinary disclaimer: This guide provides general information about feeding older dogs and is not a substitute for veterinary diagnosis or individual nutritional advice. Senior dogs with unexplained weight changes, appetite changes, difficulty eating or diagnosed medical conditions should be assessed by a veterinary professional. Do not change a veterinary prescription diet, supplement programme or medically recommended feeding plan without discussing it with your veterinary team.