Sundowners Syndrome in Dogs

As our beloved dogs age, we often notice changes—some expected, some surprising. One of the more confusing and distressing issues senior dogs may experience is a condition known as Sundowners Syndrome. While it’s more commonly discussed in humans, especially those with Alzheimer’s or dementia, Sundowners Syndrome in dogs is a very real phenomenon. And if your older pup seems confused, restless, or anxious at dusk, you’re not imagining things.

Let’s explore what Sundowners Syndrome in dogs is, what causes it, and how you can help your pup feel safe, calm, and comfortable—day and night.

What Is Sundowners Syndrome in Dogs?

Sundowners Syndrome (sometimes called sundowning) refers to a pattern of behavioral changes that occur in the late afternoon, evening, or night. Dogs experiencing this syndrome may appear confused, agitated, anxious, or disoriented, particularly as the day fades into night. It’s most often seen in senior dogs and is usually linked to a broader condition known as Canine Cognitive Dysfunction (CCD)—the dog equivalent of Alzheimer’s disease.

Common Symptoms of Sundowners Syndrome in Dogs

If your dog has been showing some odd behaviors as the sun goes down, you’re not alone. Here are some of the most frequently reported symptoms:

• Restlessness or pacing at night
• Increased vocalization (barking, whining) in the evening
• Disorientation or confusion, especially in dim lighting
• Clinginess or increased anxiety
• Inability to settle down for sleep
• Accidents in the house, even if they’re normally house-trained
• Decreased responsiveness to commands or their name

Not every dog will exhibit every symptom, but if you’re noticing a pattern of odd behavior tied to the time of day, it’s worth talking to your vet.

What Causes Sundowners Syndrome in Dogs?

While the exact causes aren’t fully understood, Sundowners Syndrome is believed to be associated with degenerative changes in the brain due to aging.

Here are a few key factors that may contribute:

1. Canine Cognitive Dysfunction (CCD)

Just like humans, dogs can experience cognitive decline as they age. CCD affects memory, learning, and behavior. As the brain changes, dogs may lose their sense of time and routine—leading to confusion and anxiety, especially at night.

2. Disruption in Circadian Rhythm

Dogs with CCD often have disrupted sleep-wake cycles. As their internal clock becomes confused, they may start sleeping more during the day and staying awake—and restless—at night.

3. Sensory Decline

Hearing and vision loss can make it harder for your dog to navigate their environment. As darkness falls, disorientation increases, especially if they can’t hear or see well.

4. Changes in Environment or Routine

Older dogs are sensitive to changes. Moving furniture, traveling, or introducing new people or pets can worsen sundowning symptoms.

How to Help a Dog With Sundowners Syndrome

While Sundowners Syndrome in dogs can’t be cured, it can often be managed with a combination of lifestyle changes, supportive care, and in some cases, medication.

1. Establish a Consistent Routine

Dogs thrive on routine, especially when their cognitive abilities decline. Feeding, walking, and bedtime should happen at the same time each day. Predictability helps ease anxiety.

2. Light Therapy

Keeping lights on during the evening can reduce confusion and disorientation. Consider using sunrise/sunset simulation lights or leaving lamps on to help your dog transition gently into nighttime.

3. Create a Calm Evening Environment

Lower stimulation as the day winds down. Turn off the TV, play soft music, and create a cozy space where your dog feels safe. Calming pheromone diffusers (like Adaptil) can also help ease anxiety.

4. Mental Stimulation During the Day

Puzzle toys, short training sessions, and scent-based games can help keep your dog’s mind stay sharp and active. A mentally stimulated dog is more likely to rest at night.

5. Adjust Diet and Supplements

Some senior dog foods contain ingredients that support brain health, like omega-3 fatty acids (DHA), L-carnitine, and antioxidants. There are also supplements designed specifically for cognitive support, such as SAM-e, ginkgo biloba, and melatonin (for sleep).

Always check with your vet before adding supplements or changing your dog’s diet.

6. Provide Nighttime Comfort

If your dog becomes anxious at night, try giving them a comfort object—like a worn t-shirt with your scent—or moving their bed closer to yours. Some dogs also respond well to compression garments like the Thundershirt, which can reduce anxiety.

7. Talk to Your Vet About Medications

For moderate to severe cases, your veterinarian may recommend medication. Options include:

• Selegiline (Anipryl): Often used to treat CCD
• Anti-anxiety medications: Such as trazodone or gabapentin
• Melatonin: A natural hormone that can help regulate sleep

Medication isn’t always necessary, but it can be life-changing for dogs (and their exhausted humans).

When to See Your Vet

If your senior dog is showing signs of confusion, anxiety, or changes in sleep and behavior, it’s time for a veterinary checkup. Many health issues, including pain, vision loss, hearing decline, and even urinary tract infections, can mimic or worsen Sundowners Syndrome in dogs.

Early intervention is key to helping your dog maintain quality of life. The sooner you start managing the condition, the better the outcomes—for both of you.

Sundowners Syndrome in Dogs is Manageable With Love and Support

Watching your dog age isn’t easy—especially when cognitive decline sets in. But with the right tools, consistent care, and lots of patience, you can help your pup feel secure, supported, and loved through every stage of life.

Keep Their Golden Years Golden: Why Pet Insurance Matters

Sundowners Syndrome in dogs is just one of many age-related conditions that may require veterinary support, medications, and ongoing care. Pet insurance can help ease the financial burden of treating chronic or unexpected issues—especially in your dog’s senior years.

With the right pet insurance plan, you won’t have to choose between your dog’s comfort and your budget. Coverage can include diagnostic tests, medications, behavioral consultations, and even supportive therapies—giving you the freedom to focus on what really matters: keeping your furry friend happy and well-cared-for in their twilight years.

Protect your pup’s future. Explore pet insurance today.

References:

1. https://www.akc.org/expert-advice/health/dog-dementia/
2. https://www.whole-dog-journal.com/care/sundowners-in-dogs/
3. https://www.vet.cornell.edu/departments-centers-and-institutes/riney-canine-health-center/canine-health-information/senior-dog-dementia

 

Disclaimer

The information contained on this blog is intended for informational and educational purposes only and should not be construed as medical advice. It is not a substitute for professional veterinary care. Always consult with your veterinarian before making any changes to your pet's health care or treatment plan.

The authors of this blog are not veterinarians and do not claim to be experts in pet health. The information provided here is based on our own experiences and research, as well as information from reputable sources. However, we cannot guarantee the accuracy or completeness of this information.

We encourage you to do your own research and consult with your veterinarian before making any decisions about your pet's health.