Senior dog: the changes you get used to

Old age comes in small steps, and for each one you have an explanation.

You notice it first when getting up. He needs two attempts, shakes himself later than usual, takes the first steps cautiously. On the stairs, he hesitates briefly. Before jumping into the car, he waits until you help him.

For each of these observations, you have a plausible explanation. He did a lot yesterday. The floor is slippery. He has simply gotten older.

That is exactly what makes this phase difficult. Your dog does not age on a Thursday in May, but in micro-steps over months, and you are there for each one. Those who watch daily see change the worst.

Much of what takes quality of life from a senior dog is treatable. Someone just needs to notice.

What is really happening now

When a dog becomes a senior depends mainly on its size, and the range is wide.

The American Animal Hospital Association defines it in its Canine Life Stage Guidelines (2019) as follows: a dog is senior as soon as it has reached around 75 percent of its estimated life expectancy, i.e. in the last quarter of its life.

Why you notice it last

In a puppy, every week is visible because everything changes. In an old dog, hardly anything changes per week and a lot over a year.

Added to this is a characteristic that distinguishes dogs from humans: they compensate for pain through movement patterns rather than showing it. A dog with osteoarthritis rarely whines. It takes shorter walks, goes up the stairs more slowly, stands up less often. Anyone waiting for a clear signal waits months.

So pain becomes normal stiffness, less appetite becomes eating less today, and less activity becomes just having gotten older.

Old is not sick

Many dogs remain curious and eager to learn well into old age. Your goal in this phase is not to slow down ageing, that is not possible. It is about recognising pain early, removing avoidable burdens, and regularly checking quality of life consciously rather than estimating it.

Seven sentences almost everyone says

None of these sentences is stupid. All are plausible, all are sometimes true, and almost every owner has said at least three of them. They are rarely the whole explanation.

What helps in all seven cases is the same: not guessing, but measuring. Film your dog every three months when getting up, always in the same place, and compare the recordings. Changes that blur in everyday life are unmistakable on two videos side by side, and your vet gets a diagnosis rather than a memory.

What might be behind it

Osteoarthritis

The most common chronic disease in ageing dogs, and the one most reliably overlooked. How many dogs are affected depends on how it is measured: it is diagnosed in around 2.5 percent of all dogs per year. In X-rays, dogs over eight years old with joint problems show changes in 36 to 57 percent depending on the joint.

Between these two numbers lie all the dogs whose osteoarthritis is never recognised.

It is not curable, but well treatable. What works together: pain medication, physiotherapy, weight control, orthopaedic beds, non-slip floors and regular short exercise sessions. Individual miracle cures do not replace a veterinary plan.

Heart, kidneys, thyroid

With age, the likelihood of heart valve disease, chronic kidney insufficiency and hypothyroidism increases. Visible symptoms appear late: coughing when getting up, increased thirst, scruffy coat, weight gain despite an unchanged ration.

Semi-annual blood and urine tests usually detect these conditions months before the first complaints arise, i.e. in the phase where treatment has the greatest effect.

Dementia

Canine Cognitive Dysfunction affects about a third of dogs from twelve years of age; among fifteen-year-olds, clinical studies show that around every second dog is affected. Typical signs are disorientation in one’s own home, changed social behaviour, staring into space, disturbed sleep-wake rhythm and the loss of learned routines, including house training.

An early diagnosis slows the progression through medication, cognitive training, adapted nutrition and a stable environment.

The order of investigation is important. Always rule out pain and metabolic issues first whenever there is a behavioural change in old age, before dementia remains as the explanation. Night-time restlessness looks the same with osteoarthritis and dementia, and often both are present at the same time.

Vision, Hearing, Smell

Sensory performance declines. The lens clouding of the old dog, nuclear sclerosis, is normal and hardly impairs vision, unlike cataracts. Hearing loss often develops so gradually that it only becomes noticeable when the dog no longer responds to its name.

What you can control

Nutrition

Seniors have a lower energy requirement with the same or slightly increased protein requirement. There is no one-size-fits-all senior diet, because different rules apply for impaired kidney function than for osteoarthritis with overweight.

The most important adjustment lever is the calorie amount. Many old dogs become too heavy because the ration stays the same while activity decreases. Reduce the ration moderately, check the weight every three weeks and adjust further.

In cases of chronic diseases, a veterinary nutritional consultation is worthwhile. An adapted ration can noticeably slow the progression of kidney insufficiency, heart disease or diabetes, which generic senior dry food rarely achieves.

Adapt exercise rather than eliminate it

Even an dog with osteoarthritis needs exercise. Several short walks of 15 to 30 minutes are more effective than one long walk. Avoid hard impact loads such as jumping out of the car, bikejoring or jerky play sequences. On soft ground, it runs more relaxed than on asphalt. Swimming is one of the best forms of exercise for dogs with joint disease, provided the water is warm enough and it enters voluntarily.

The most common well-intentioned mistake is going in the opposite direction. Out of concern for the joints, walks are cancelled, the dog lies around more, loses muscle mass, becomes stiffer and runs even less. Constant gentle loading maintains muscle mass and joint stability significantly better than rest.

Semi-annual preventive care

From senior age onwards, it is worthwhile to switch from annual to semi-annual preventive examinations. These include a general examination, blood count, blood chemistry, urine analysis, blood pressure measurement and a targeted pain assessment; from about ten years of age, additionally a geriatric profile with an echocardiogram for at-risk breeds.

In this rhythm, age-related diseases are detected in the phase where medical or dietary intervention can still effectively alter the course.

What matters now

In other life phases, attention pays off in the long term. With the puppy, you learn for the next twelve years; with the adolescent dog, you work on the adult dog. Here, the timeframe is shorter and the effect becomes visible more quickly.

A dog whose osteoarthritis is recognised and treated moves differently two weeks later. One whose thyroid is adjusted becomes alert again within weeks. One whose dementia is detected early retains its routines longer.

That is why the senior phase has its own page on rundum.dog. Here, every observation changes something particularly quickly.

The path in the opposite direction is just as short.

Untreated pain costs not only mobility. It makes the dog irritable, disturbs sleep, reduces appetite and causes a dog that was never cautious to become so. What then looks like ageing is largely treatable.

Therefore, at the beginning of every behavioural change in old age stands the same question: Could this hurt?

And for you as owner

This part is rarely written about. The care of an old dog changes your daily life more than one thinks beforehand, and it does so quietly.

You reschedule appointments around medication times. You sleep worse because it becomes restless at night. You calculate vet costs and feel ashamed for calculating them. You observe it constantly and never know for sure whether you are reading too much or too little into things.

This burden has been investigated, and it has a clear cause. It is not the age of your dog that burdens you, but the care of an illness. A study at LMU Munich compared 67 owners of dogs with chronic paralysis with 90 owners of healthy dogs: The caregivers achieved significantly higher burden values while simultaneously having lower quality of life. A survey of 516 dog owners in Slovenia explicitly included owners of healthy old dogs as a comparison group, and the burden was significantly increased there in cases of dementia and cancer.

An old dog alone does not push you to the limit. An illness that you accompany over months can do so.

And if the low mood persists for weeks, you withdraw or no longer find joy in things that were previously good, then speak to your doctor. This is just as unembarrassing as a conversation with the vet about the dog.

The final decision

There is no objectively right time, but rather the moment when the bad days clearly outweigh the good ones.

A help for this is the HHHHHMM scale: Hurt, Hunger, Hydration, Hygiene, Happiness, Mobility, More good days than bad. You rate each of the seven points from one to ten and record the values over weeks. At the end, there is an observation rather than a gut feeling, and that is exactly what carries you through in the most difficult moment.

If pain relief and medication no longer bring improvement and the bad days predominate, discuss the timing with your vet. This decision is never easy. It belongs to the responsibility one takes on with a dog, and it is a final form of care.

Why we take this phase so seriously

Frequently asked questions about senior dogs

Where you read on next

Guides for this phase

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Terms and definitions

• Haemangiosarcoma

  Haemangiosarcoma is a malignant tumour of the blood vessels that can affect the spleen, heart or liver in dogs and is often detected only …

• Laryngeal Wheezing

  Laryngeal wheezing (laryngeal paralysis or laryngomalacia) refers to a partial or complete narrowing of the airways in the laryngeal area, where the vocal cords …

• Myeloma

  Myeloma is a malignant cancer in dogs that arises in the bone marrow from degenerate plasma cells, which divide uncontrollably and impair several vital …

• Prostate Hyperplasia

  Prostate hyperplasia (medically: benign prostatic hyperplasia, BPH) is a benign, hormonally controlled enlargement of the prostate gland that primarily affects older, intact male dogs.

• Sclerosis

  Sclerosis denotes a hardening or stiffening of tissues and organs, in which fibrous connective tissue accumulates and gradually displaces healthy tissue.