Senior Dog Health Guide: Signs of Ageing, Common Conditions & Care

As dogs move into their golden years, their needs shift in ways that are easy to miss until they add up. A little more stiffness, a little more sleep, a slightly cloudier eye — these gradual changes are part of ageing, but some also signal conditions worth catching early. With the right care, most senior dogs stay happy and comfortable for years. Here's how to recognise the signs of ageing, understand common senior conditions, and support your older dog at home.

When is a dog a senior?

There's no single birthday that makes a dog "old." Size and breed matter most: small dogs often aren't considered senior until 10 to 12 years, medium dogs around 8 to 10, and large or giant breeds as early as 6 to 7, because bigger dogs age faster. Rather than fixating on the calendar, it's more useful to watch for the physical and behavioural changes that come with age and adjust your dog's care to match.

Signs of ageing to watch for

Some changes are normal, but they're still worth noting and mentioning to your vet:

• Slowing down, less interest in play, and stiffness after rest
• Greying around the muzzle and a cloudier appearance to the eyes
• Sleeping more and reduced stamina on walks
• Weight gain or unexplained weight loss
• Changes in appetite, thirst or toilet habits
• Reduced hearing or vision
• Behavioural shifts — confusion, restlessness at night, or clinginess

Common senior dog health conditions

Arthritis and joint disease

One of the most common issues in older dogs, causing stiffness, difficulty with stairs, and reluctance to jump. A supportive bed, ramps and joint care make a real difference.

Dental disease

Years of wear lead to tartar, gum disease and painful teeth that can affect eating and overall health. Regular dental care and vet cleanings help.

Kidney and liver disease

Increased thirst and urination, or reduced appetite, can signal declining organ function — often caught early through routine bloodwork.

Heart disease

Coughing, tiring quickly and heavier breathing can point to age-related heart conditions that benefit from early management.

Cognitive dysfunction

A canine form of dementia that shows up as disorientation, altered sleep, and changes in interaction. Routine and enrichment help slow its impact.

Lumps and cancer

New lumps are more common with age. Most are benign, but any new or growing mass should be checked promptly.

Day-to-day care and management

Small adjustments keep an older dog thriving. Feed a quality, age-appropriate diet and watch portions to avoid weight gain that stresses the joints. Keep exercise gentle but regular to maintain muscle and mobility. Add traction on slippery floors, provide a warm, supportive orthopedic bed, and use ramps for cars or furniture. Stay on top of dental care, grooming and nail trims, and consider vet-recommended joint or wellness supplements. A predictable routine reduces stress for dogs whose hearing, vision or memory is fading.

Nutrition and weight

Weight is one of the biggest levers for senior health. Extra pounds put strain on ageing joints, the heart and organs, while too little weight can signal illness. Senior diets are often lower in calories but rich in quality protein to preserve muscle, and some include added joint support. Measure meals, limit treats, and ask your vet whether a therapeutic diet suits any conditions your dog has. Fresh water should always be easy to reach.

Vet checkups and screening

Because older dogs age quickly, most vets recommend a checkup every six months rather than annually. These visits often include bloodwork, urine tests and blood pressure checks that catch kidney disease, diabetes, thyroid problems and other conditions before symptoms appear. Early detection almost always means easier, more effective treatment and a better quality of life.

When to see a vet

Book a visit if you notice sudden changes in appetite, weight, thirst, energy or toilet habits, new or growing lumps, or a decline in mobility. Seek urgent care for collapse, difficulty breathing, repeated vomiting, a swollen belly, or signs of significant pain. When in doubt with an older dog, it's always better to have symptoms checked sooner rather than later, since conditions can progress faster at this stage of life.

Frequently asked questions

At what age is a dog considered a senior?

It depends largely on size and breed. Small dogs often aren't considered senior until around 10 to 12 years, medium dogs around 8 to 10, and large or giant breeds as early as 6 to 7 years because they age faster. Rather than fixating on a number, watch for age-related changes like slowing down, greying, and stiffness, and ask your vet to start senior wellness checks accordingly.

How often should a senior dog see the vet?

Most vets recommend that senior dogs have a checkup every six months rather than once a year. Because older dogs age faster and can develop conditions quickly, these more frequent visits, often with bloodwork and other screening, help catch problems like kidney disease, arthritis and dental issues early when they're easier to manage. Always book sooner if you notice sudden changes in appetite, weight, mobility or behaviour.

How can I keep my senior dog comfortable at home?

Provide a supportive orthopedic bed, keep food and water easy to reach, and add rugs or runners on slippery floors to help with traction. Gentle, regular exercise, a joint-friendly diet, ramps for cars or furniture, and keeping a consistent routine all help. Staying on top of dental care, weight management and any prescribed medications keeps an older dog more comfortable and mobile for longer.

This guide is educational and not a substitute for professional veterinary care. If you're worried about your dog, contact your vet.