Dog Dementia: Causes, Symptoms & Treatments

Your dog will continue to have many wonderful experiences in their senior years, but aging can present some new health challenges. Among those is the potential for dog dementia; however, thanks to current research and medical advances, a dog can prosper with proper care and support.  

According to Purina Senior Veterinarian Dr. RuthAnn Lobos, “Being proactive in supporting the changes that occur in our senior dogs as they age can help them continue to thrive in their golden years. We have more tools to support pet parents and their senior dogs than we did even just 10 years ago thanks to great research and efforts across the entire veterinary and pet care industry.”  

Being proactive in supporting the changes that occur in our senior dogs as they age can help them continue to thrive in their golden years. We have more tools to support pet parents and their senior dogs than we did even just 10 years ago thanks to great research and efforts across the entire veterinary and pet care industry.

       – Dr. RuthAnn Lobos, Purina Senior Veterinarian 

Cognitive decline in senior dogs is a fairly common but serious condition. Fortunately, depending on the stage and severity of your pet’s disease, it’s possible to slow its progression through proper care.  

Read on to learn more about dementia in dogs, including information on symptoms, life expectancy, and treatment options.

Can Dogs Get Dementia?

Yes, dogs can get dementia. According to The National Library of Medicine, the percentage of dogs who develop dementia increases with age:

Along with joint problems and heart disease, brain health is an area of concern for senior dogs.

What Is the Cause of Canine Cognitive Dysfunction Syndrome (CCDS)?

Dog dementia refers to the brain’s inability to function properly due to age. It is usually called Canine Cognitive Dysfunction Syndrome (CCDS), also known as Canine Cognitive Dysfunction (CCD), and can be colloquially referred to as dog Alzheimer’s. CCDS occurs when there are changes to the brain, including abnormal protein accumulation (amyloid plaques) in the brain’s frontal lobe and degeneration of brain cells (neurons).  

The frontal lobe controls things like memory and learning. Once the plaque spreads to other parts of your dog’s brain, it can affect spatial awareness, among other functions.

Dog Dementia Symptoms

CCDS in dogs is a progressive condition, which means symptoms are usually mild and limited at first but develop over time.

In the early stages of CCDS, you may only see a slight change in your senior dog’s behavior, but it helps to understand the range of symptoms.

Signs of dementia in dogs include:  

• Disorientation – getting stuck behind furniture or appearing lost in familiar places
• Confusion – not recognizing familiar people or pets
• Change in sleep patterns – sleeping more overall but less at night
• Forgetting commands and house-training
• Pacing and aimless wandering
• Increased anxiety

Stages of Dog Dementia

CCDS in dogs develops across three general stages: early, moderate, and severe. (Note symptoms may present or overlap across different stages.)

Early Stage

Unfortunately, in the first stage, signs of early onset dementia in dogs can be easy to miss. They may include subtle shifts in behavior such as less social interaction with your family, friends, and other pets.  

Moderate Stage

In the moderate stage of dog dementia, symptoms often increase and become more obvious. Your pet may start going potty inside or forget where they are.  

Severe Stage

In the severe stage, your dog will likely be frequently disoriented. In addition to other symptoms, they might bark for seemingly no reason, pace at night, or fail to respond to their name.  

Dog Dementia Life Expectancy

According to research, symptoms of CCDS in dogs can develop from mild to moderate in about six months. This is notably faster than the rate of progression for Alzheimer’s in humans, which may be explained by the fact that dogs age faster than people.

Remember, though, every dog is different, and their condition will track at its own pace.

In terms of life expectancy, talk to your veterinarian about what to expect. They can evaluate your pet’s quality of life and, if possible, give you a prognosis.

Does My Dog Have Dementia – Quiz

If you think your pet might have dog CCDS, note their changes of behavior. This will help your veterinarian make a formal diagnosis.

You can make your own canine cognitive dysfunction checklist or take our Dog Dementia Quiz (and consider printing before your veterinarian’s visit). This can help clarify your pet’s symptoms.  

Diagnosing Dog Dementia

Though there’s no formal test for diagnosing dog CCDS, an evaluation tool developed by the Purina Institute can help. There is also research being done to aid in the diagnostics for this condition, including magnetic resonance imaging (MRI) scans, cerebrospinal fluid (CSF) cell counts, biomarker testing, cognitive testing, and more.¹ Your veterinarian will make an assessment based on your pet’s symptoms, physical examination, and health history. They’ll likely also want to rule out any other illnesses that may be causing symptoms.

Dog Dementia Treatment

If your pet has senior dog cognitive dysfunction, there are a range of treatment options. Remember, there’s no cure for CCDS in dogs, but early treatment can help slow the progression of the disease.  

Diet

Research has found that a balanced diet with key nutrients can help keep an aging dog’s brain healthy, support memory and learning, and promote overall cognitive function as they grow older. One important nutrient is medium-chain triglycerides (MCTs), which provide the brain with ketones, an alternative energy source that can help support brain function. Studies have shown that senior dogs who were fed diets containing MCTs experienced improvements in memory within two weeks and performed better on cognitive tasks involving learning, reasoning, awareness, perception, and adaptability than dogs fed a standard diet.²

This is why one common method of canine cognitive dysfunction treatment is diet. Feed your pet high-quality, complete-and-balanced senior dog food that’s formulated to support their aging bodies and brains, such as Pro Plan® Bright Mind, Pro Plan® AdvantEDGE Senior Support+, and Purina® ONE Vibrant Maturity.

Therapeutic diets for brain health are also available. Ask your veterinarian if Pro Plan Veterinary Diets Neurocare is an option for your dog.

Dog Dementia Supplements

Dog food formulated for seniors may provide all the nutrition your pet needs. In some cases, though, supplements for canine cognitive dysfunction may be appropriate.

Whether they’re natural supplements for dog dementia or a different kind of supplement, brain health supplements often contain ingredients such as antioxidants, medium-chain triglycerides (MCTs), and docosahexaenoic acid (DHA), among others.

As with all dietary decisions, talk to your veterinarian about dog dementia supplements before giving them to your pet.  

Medication

In addition to diet, medication may be available to treat dog dementia symptoms to help improve symptoms and quality of life. Ask your veterinarian if it’s appropriate for your pet, or if they have other recommendations.  

Supportive Care

Alongside these methods are alternative forms of care, such as acupuncture, massage therapy, physical rehabilitation, light exercise (e.g., swimming), and other forms of supportive treatments that can aid in your dog’s mobility, mental engagement, and more. Talk with your vet to see which supportive care treatments will work best for you and your pet.  

Lifestyle Changes

Your support also plays an important role in helping a pet with dog dementia.  

• Provide enrichment and mental stimulation activities for senior dogs.
• Keep them physically active.
• If your pet has accidents in the house, place potty pads in areas where they tend to go.
• Ensure your home is accessible to them, but close off areas where they might become stuck.
• Refrain from getting angry with your dog over their behavior; it may worsen their anxiety.

Dog Dementia at Night

An unfortunate symptom of dementia in dogs can be the change to their sleep-wake cycles. It’s not uncommon for canines to sleep less at night. They may wander the home while whining or panting, which of course can wake you up.

Wondering how to calm a dog with dementia at night? Here are a few tips to try:

• Give them enough exercise and mental stimulation during the day.
• Keep a consistent sleep and feeding schedule.
• Provide a comfortable and calm sleeping environment.
• Put night lights around the house to guide them.
• Ask your veterinarian if there are other ways to reduce anxiety related to their condition.

If you’re asking, Does my dog have dementia?, pay attention to their symptoms and other factors such as general health and age (dogs are considered senior around age seven).  

If your veterinarian determines your pet has CCDS, they’ll recommend treatment depending on the severity of your dog’s symptoms. From canine cognitive dysfunction supplements to medication, there may be a range of options to provide comfort and slow the disease’s progression.  

For more expert tips for the health of your canine companion, explore our other dog health articles.

References:

1. American Animal Hospital Association. First-ever guidelines published for diagnosis and monitoring of canine cognitive dysfunction. Trends Magazine. Published 2026.

2. Purina Institute. Aging Brain. Purina Institute: Science of Nutrition.