Sundowning in Dogs: Signs, Causes, and Nighttime Care

What does sundowning look like in dogs?

Repeated evening pacing, vocalizing, difficulty settling, or confusion in familiar rooms can be signs of sundowning. Look for changes from your dog's usual behavior.¹

Possible signs include:

• Pacing or wandering after dark.
• Whining, barking, or repeatedly waking the household.
• Appearing lost in a familiar room.
• Getting stuck near furniture or on the wrong side of a door.
• Sleeping more during the day and staying awake at night.
• Becoming unusually clingy, fearful, or difficult to settle.¹

Describe what you see before giving it a label. “He walked between the bedroom and hallway five times” is more useful than “His dementia was bad.” Note whether the change is new, gradually increasing, or happening at a particular time.

Sundowning describes the timing of a problem. For the broader pattern of cognitive decline, including changes during the day, see our guide to dog dementia symptoms, stages, and home care.

Why can confusion become worse at night?

Cognitive dysfunction can affect the sleep-wake cycle. A 2023 study of 28 senior dogs found an association between worse cognitive performance and changes in sleep measured during afternoon naps. It supports a connection between cognition and disrupted sleep, but it does not prove why an individual dog becomes restless after sunset.⁴

Reduced vision may also make dim rooms harder to navigate. A dog may struggle with both cognitive changes and difficulty seeing. Adding light can address visibility; it does not establish what caused the restlessness.²³

Avoid assuming that darkness itself caused the disease or that keeping a light on will resolve every nighttime symptom.

Could something else be keeping your dog awake?

Yes. Pain, urinary problems, changes in vision or hearing, and other illnesses can resemble or accompany cognitive dysfunction. The following observations are reasons to investigate, rather than a way to diagnose the problem at home.²

For recurring nighttime changes without emergency signs, arrange an appointment and start recording your observations. You do not need to complete a week of notes before calling.

How to help a dog who is unsettled at night

Start with a predictable evening routine, a clear route between familiar places, and activity suited to your dog's health. Discuss recurring nighttime changes with your veterinarian and use the steps below alongside their care plan.²³

Keep the evening sequence familiar

Aim for consistent meals, toilet breaks, and bedtime. Keep your dog's bed and bowls in familiar places. Predictable routines and a stable home layout are recommended in Cornell's senior-dog care guidance.³

Choose a sequence your household can repeat: an appropriate evening activity, a toilet opportunity, then time in the usual resting area. Write it down if more than one person provides care so your dog is not getting a different arrangement each night.

Keep activity within your dog's abilities

Ask your veterinarian what level of walking and mental activity fits your dog's health. Gentle enrichment might mean an easy sniffing activity, a familiar cue, or a simple food puzzle your dog already enjoys. Stop if the activity causes frustration or discomfort.²⁶

The goal is comfortable engagement. Do not make exhausting your dog or keeping them awake all day part of the plan.

Check the route from bed to water and the door

Walk through that route yourself before bedtime. Pick up shoes, bags, and loose objects. Check that a door left partly open has not created a narrow space your dog can enter but struggle to leave.

Block access to unsafe stairs and spaces where your dog becomes trapped. Keep the familiar route straightforward rather than rearranging the room every evening. Cornell specifically recommends restricting unsafe areas for dogs with cognitive changes.³

Offer calm help when your dog wakes

Check whether your dog needs a toilet break, appears uncomfortable, or cannot find the resting area. Use familiar cues and avoid turning each wake-up into a busy interaction. Ask your veterinary team how best to respond if your dog becomes distressed when separated from you.

If the same problem keeps happening, record it and update your veterinarian. Repeatedly guiding a dog back to bed may get you through the moment, but it does not explain why they cannot settle.

Can a night light help a sundowning dog?

A night light may help a dog with useful remaining vision see a familiar route. Cornell recommends nightlights as part of home care for older dogs who wander at night.³

Lighting addresses visibility. It does not treat dementia or guarantee sleep.

Lighting cannot restore lost sight. If your dog is completely blind, focus with your veterinary team on the home layout, barriers, and other suitable navigation cues. Do not assume a brighter lamp will solve the problem.

Motion-sensing or steady-on?

Choose based on what the route needs, then observe your dog's response. This is a practical setup decision, not a clinically validated dementia treatment.

Test a motion sensor with your dog under supervision. Activation by a standing adult does not confirm it will work from your dog's height, direction, or speed. If the route needs continuous light, use a suitable steady source and check its power supply.

Sun Down Sticks offer motion-sensing and steady-on modes with USB-C charging. You can review how the two lighting modes work before choosing where to place one.⁷

Keep the light, mount, and charging cable out of chewing reach and out of the walking path. Follow the installation instructions and check the light before bedtime.

What can a veterinarian do for sundowning?

Your veterinarian can assess the causes of nighttime distress and discuss a plan for your dog. Depending on the findings, that may include managing pain or another illness, adjusting the environment, and considering treatment for cognitive dysfunction or anxiety.²⁶

Bring a list of all medications and supplements, including nonprescription products. Do not add a human sleep aid or combine calming products without veterinary advice. Some treatments can interact with other medications.⁶

Ask three practical questions:

1. What should we change first?
2. What response should we watch for, and when should we report back?
3. Which changes mean we should call sooner?

Does melatonin help dogs with sundowning?

It may help some dogs, but Cornell notes that supporting studies are limited. Ask your veterinarian whether it is appropriate for your dog and which formulation to use. A supplement should not take the place of investigating new nighttime behavior.³

Keep a nighttime observation log

Use a notebook or phone note to capture the details below. This is an observation aid, not a diagnostic score or a test of whether a light treats dementia.

If it is safe, a short video may help show what you mean. Share observations from calmer nights as well as difficult ones. A more comfortable night is useful information, but it cannot confirm a diagnosis or prove which change helped.

What if the difficult nights keep happening?

Tell your veterinarian how the nights affect both your dog and your household. Interrupted sleep and ongoing caregiving demands deserve a place in the care discussion. AAHA's senior-care guidance recognizes caregiver burden as part of supporting an aging pet.⁸

Bring your log, describe the hardest part of the night, and ask for a follow-up plan you can realistically maintain. You do not have to solve every change at once to take a useful next step.

Sundown Sticks are a comfort-and-safety lighting aid, not a medical device, and are not intended to diagnose, treat, cure, or prevent any condition.