Understanding Behaviour Changes in Senior Dogs and How to Address Them

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Why Older Dogs May Act Differently

Dogs today are living longer than ever thanks to improved veterinary care and better nutrition. As dogs age, however, physical and medical changes can affect their behaviour.

Many owners notice that their older dog begins to behave differently. Changes in activity, appetite, sleep patterns, or temperament may occur as part of aging, but they can also indicate underlying health problems.

Understanding these changes can help owners recognise when a veterinary examination may be needed.

Why Behaviour Changes Occur in Older Dogs

As dogs age, several medical conditions can influence behaviour.

Common age-related health problems include:

• arthritis and joint pain

• dental disease

• diabetes

• thyroid disorders

• Cushing’s disease

• cancer

• loss of vision or hearing

These conditions can lead to behavioural changes such as reduced activity, irritability, anxiety, or changes in appetite.

Because these problems often develop gradually, changes in behaviour may be subtle at first.

What Is Canine Cognitive Dysfunction?

Another important cause of behavioural changes in senior dogs is Canine Cognitive Dysfunction Syndrome (CCDS).

This condition is similar in some ways to Alzheimer’s disease in humans and affects the brain of aging dogs.

Dogs with cognitive dysfunction may develop symptoms such as:

• confusion or disorientation

• reduced interaction with family members

• restlessness at night

• increased vocalisation

• house soiling

• anxiety or irritability

Although cognitive decline is most common in older dogs, signs can sometimes appear as early as five years of age, particularly in large breeds.

Signs of Cognitive Dysfunction in Dogs

Veterinarians often use a simple framework called DISHA to describe common symptoms of cognitive decline.

These include:

D – Disorientation - The dog may appear confused, get stuck in corners, or seem lost in familiar areas.

I – Changes in Social Interaction - Dogs may become less interested in family members or may behave differently with people or other pets.

S – Changes in Sleep-Wake PatternsDogs may sleep more during the day and become restless or vocal at night.

H – House Soiling - Previously house trained dogs may begin urinating or defecating indoors.

A – Changes in Activity or Anxiety - Some dogs may become more anxious, restless, or less interested in normal activities.

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Why Veterinary Evaluation Is Important

If your senior dog develops behaviour changes, it is important to have them examined by a veterinarian.

Many medical conditions can cause similar symptoms, so diagnostic testing may be recommended to identify the underlying cause.

Your veterinarian may perform tests such as:

• blood tests

• urinalysis

• thyroid testing

• imaging such as X-rays

These tests help rule out medical problems before diagnosing cognitive dysfunction.

Treatment Options for Senior Dogs

While cognitive dysfunction cannot be completely cured, several treatments may help improve a dog’s quality of life.

Possible treatments include:

• pain relief medications for arthritis

• prescription diets designed for brain health

• behavioural supplements

• pheromone therapy

• anti-anxiety medications

The goal of treatment is to improve comfort, reduce anxiety, and support mental function.

Mental Enrichment for Older Dogs

Providing mental stimulation can also help support cognitive health.

Helpful activities include:

• puzzle feeders or interactive toys

• scent games using hidden treats

• learning new tricks using positive reinforcement

• gentle play sessions

Mental enrichment helps stimulate the brain and may slow the progression of cognitive decline in some dogs.

Supporting Your Dog in Their Senior Years

Behaviour changes in older dogs are common, but they should never be ignored.

Many age-related conditions can be treated or managed effectively, helping senior dogs remain comfortable and enjoy a good quality of life.

Regular veterinary examinations are especially important as dogs age.

Senior Dog Care in Kalamunda

If your older dog is showing behaviour changes such as confusion, anxiety, or house accidents, the team at Hilltop Veterinary Hospital in Kalamunda can help evaluate your dog’s health and discuss possible treatment options.

Early intervention may significantly improve your dog’s comfort and wellbeing.

Concerned About Behaviour Changes in Your Dog?

If you notice unusual behaviour in your senior dog, book a consultation with Hilltop Veterinary Hospital so our veterinary team can assess your dog and recommend appropriate care.

Explore More Pet Health Advice

For more practical veterinary advice, explore our Pet Health Advice library, where we cover common health problems, preventative care, behaviour, and early signs of illness in dogs, cats, birds, reptiles, and other exotic pets.

The information provided in this article is intended for general educational purposes only and should not replace professional veterinary advice. Every pet’s medical situation is unique. If your dog shows behaviour changes or signs of illness, consult your veterinarian for a proper examination and personalised guidance.