How to Calm a Dog With Dementia at Night: What Has Trial Data and What Is a Tip

How do you calm a dog with dementia at night?

You calm a dog with dementia at night by ruling out pain and a full bladder, keeping a fixed evening routine and using a night light. Then ask your vet about medication and diet.

Most common advice has no night-time sleep trial behind it. The sections below mark which options have data and which are practical tips, with the study and its size named wherever a number exists.

Call a vet now if your dog collapses, has a seizure, loses balance suddenly, tilts its head, or struggles to breathe. Slow cognitive decline does not cause those. For breathing that is fast at night, see why an old dog pants at night.

Why is dog dementia worse at night?

Dog dementia is worse at night because it disrupts the sleep-wake cycle, so dogs sleep more by day and pace or vocalize in the dark.

The 2025 working-group guideline lists sleep disruption as one of seven behavior groups (DISHAA). A 2026 survey in The Veterinary Journal asked owners of 205 dogs aged 8 and older about sleep. Over half said their dog was most unsettled between 02:00 and 05:00. Owners of more impaired dogs reported less night-time sleep, more daytime sleep and more trips out at night, though sleep-duration differences between severity groups were not statistically significant. Late-afternoon and early-evening restlessness, the classic “sundowning” pattern, showed an increasing trend with impairment.

The survey is owner-reported, so it shows a pattern, not a cause. The pattern is clear: a 3 a.m. problem is typical of this condition. To confirm the diagnosis, start with the DISHAA signs checklist, and see how the stages progress to know what comes next.

What should an evening routine for a dog with dementia include?

An evening routine for a dog with dementia should fix the timing of the last meal, walk and toilet trip, keep the room lit softly, and make the floor safe to walk on.

Use the checklist below. The last column says what backs each item, so you can judge how much weight to give it.

Step	What to do	What backs it
Light	Leave a low night light on so your dog can see and is less likely to get stuck	Cornell recommends night lights; no trial of sleep effect
Timing	Feed, walk and go to bed at the same times each day	Cornell: most senior dogs prefer a set routine for key events; no trial
Walk	Take a calm sniff walk before bed, not a hard one	Cornell: an extra bedtime walk may lead to longer, deeper sleep; no trial
Toilet	Offer a last trip out just before you settle for the night	Nocturnal elimination rose with severity in the 2026 survey
Traction	Put runners or rugs between the bed and the door	Practical tip; no trial
Bed and bowls	Keep the bed, water and exits in the same places	Cornell: keep bowls and bed locations unchanged
Pain check	Watch whether your dog shifts, pants or cannot settle on a hard floor	Guideline requires other causes be managed first

Check pain first. The guideline’s first-level diagnosis requires that signs persist after related conditions are managed. If your dog also struggles to stand or its back legs slip, read about back legs giving out and raise it with the vet.

Tonight, write down the time your dog wakes and what it does. Three nights of notes make the vet visit far more useful.

What can I give my dog with dementia to sleep at night?

What you can give a dog with dementia to sleep depends on your vet’s exam, and the options with the best evidence are selegiline and certain diets.

Skip human sleep aids, antihistamines and supplements unless your vet prescribes them. The table lists each option, the study behind it and what that study could and could not show.

Option	Study and size	Result	Limit
Selegiline (FDA-approved for dementia signs)	Open-label field study, 641 dogs, 60 days (2001)	77.2% improved overall; 67.8% for activity or sleep-wake	No control group; owner-rated
MCT diet with antioxidant blend	Double-blind, placebo-controlled, 87 dogs, 29 per group, 90 days (2018)	6.5% MCT diet improved all 6 sign categories; control improved 4 of 6	The 9% MCT diet improved only in dogs that accepted it
Omega-3 fatty acids and other supplements	Systematic review of trials from 2002 to 2023 (2025)	Omega-3 helped, more at higher doses; vitamins E and C alone were less effective	Supplement trials were lower quality than diet trials
Antioxidant diet plus enrichment	Two-year study in laboratory beagles (2005)	Combined treatment gave more accurate learning than either alone	Lab dogs, learning tests, not sleep
Donepezil depot injection	Randomized trial, 32 dogs: 11, 11 and 10 per group, 28 days (2025)	High-dose group improved on three scales vs control	Small, short and a single trial
Melatonin	Cornell page	Cornell says little study support	No controlled trial in dogs with dementia turned up in a Europe PMC search on 2026-10-26
Trazodone, rapamycin, CBD	Placebo-controlled TRAC trial at Colorado State	Under way, per a 2026 review	No results cited yet

Selegiline’s approval status and its trial figures come from the 2001 field study and a 2026 review. Cornell says owners may see change in about three weeks, sometimes six.

How big were the effects, and how much was placebo?

The selegiline result is large on paper, but a 2025 study shows owner scores can improve a lot on placebo alone.

Start with the arithmetic. In the 641-dog study, 77.2% improved: 0.772 × 641 is about 495 dogs, so about 146 did not. Adverse events were logged in a few dogs: diarrhea 4.2% (about 27 dogs), anorexia 3.6% (about 23) and vomiting or salivation 3.4% (about 22). With no control group, the 495 cannot be split into drug effect, placebo effect and natural change.

Now the placebo data. Researchers took 21 dogs from the placebo arm of a randomized trial (18 were assessed at 6 months) and compared them with 17 dogs in an observational study. After 6 months the placebo dogs improved on average on the CADES questionnaire with a strong effect size (g = 0.76, p = 0.021). The observational dogs got slightly worse on a different scale, CCDR (g = 0.35, p = 0.03). Neither group showed statistically significant changes on the dog-based cognitive tests.

The Pan diet trial shows the same pattern. Its control group improved in 4 of 6 categories. So owner-reported improvement can occur without active treatment, and only a controlled comparison shows whether a change was the treatment.

What should I ask the vet about medication?

Ask your vet whether your dog’s night waking has a cause other than dementia, then which option fits, how long to trial it and how you will both judge it.

Bring your notes and these questions:

• Could pain, urinary problems, vision or hearing loss explain the night waking?
• Is selegiline suitable for my dog, and does it interact with anything my dog already takes?
• Would a diet made for cognitive dysfunction suit my dog, given its other health needs?
• What would count as improvement, and when do we recheck?
• Which side effects should make me call you, and what do I stop?
• If a short-term sleep aid is an option, what does the evidence say for my dog?

The 2025 US survey of 318 vets found that selegiline was most often recommended, yet only about 30% of vets rated it the most effective option. Plan a trial period with a set recheck date.

How do you stop a dog with dementia from pacing at night?

You stop pacing by treating its cause: pain, a full bladder, poor footing or confusion, and by making the room safe if pacing continues.

Block stairs and tight gaps where your dog could get stuck. Cornell’s page notes that dogs with dementia can get trapped in corners and behind furniture. Sit with your dog, keep your voice low and walk with it a short way. Never scold. If the pacing looks like circling, read why senior dogs walk in circles. If your dog paces most nights for a week, book a vet review and plan your own sleep.

When should you see a vet about night-time restlessness?

See a vet if the restlessness is new, lasts more than a few nights, comes with pain signs or accidents, or your dog does not respond to the routine.

Book soon. Go the same day for collapse, a seizure, sudden balance loss, a head tilt or hard breathing. Dementia is a diagnosis of exclusion, so even a dog with a known diagnosis needs a recheck when its nights change suddenly.