Is This Dementia—
or Something Else?
How to make sense of confusion, pacing,
night waking, accidents and other changes in an older dog.
You know your dog well enough to notice when something feels different.
Maybe they’ve started wandering through the house at night. They stand in a familiar room as though they’re not quite sure what to do next. There’s been an accident indoors after years of perfect house training. Or they seem restless, clingier, quieter, or simply not quite like themselves.
When an older dog begins doing things they never used to do, it’s understandable to wonder whether you’re seeing signs of dog dementia.
Canine cognitive dysfunction—often called canine dementia—can cause changes in sleep, house training, activity, social interaction, anxiety, and a dog’s ability to navigate familiar surroundings. But those same changes can also occur with pain, hearing or vision loss, organ disease, neurologic problems, and other conditions that become more common as dogs age. Veterinary guidelines therefore treat cognitive dysfunction as something that may require ruling out other possible causes rather than diagnosing it from one behavior alone.
That means the most useful question usually isn’t:
“Is pacing a sign of dementia?” It can be.
A better question is: “What does my dog’s whole pattern look like—and what else could be contributing to it?”
You don’t need to figure out the diagnosis yourself. But you can make the changes easier to understand by noticing what changed, when it happens, how it developed, and what else changed around the same time. That’s where to start.
One behavior
doesn’t always
have one explanation.
The same change can be caused by cognitive dysfunction, pain, hearing or vision loss, a medical condition, or something else. Looking at the pattern helps you make sense of what you’re seeing—and decide what to do next.
1
Start With the Pattern
ONE BEHAVIOR CAN POINT IN MORE
THAN ONE DIRECTION.
2
The Timeline Matters
DID THIS CREEP IN OR DID IT
APPEAR SUDDENLY?
3
Look at the Whole Dog
WHAT ELSE CHANGED AT THE
SAME TIME?
START WITH THE PATTERN
One behavior can point in more than one direction
Suppose your senior dog suddenly starts waking you at 2:00 in the morning.
Night waking can occur with cognitive dysfunction. Changes in the normal sleep-wake cycle are one of the recognized signs veterinarians look for.
But knowing that doesn’t tell you why your dog is awake.
A dog who gets up repeatedly at night might be confused or restless. They might also be uncomfortable and having trouble settling. They may need to urinate more often. Changes in hearing or vision can make familiar surroundings harder to navigate. And in an older dog, more than one problem can be present at the same time.
The same problem comes up with many of the behaviors people associate with dementia.
A dog who stops responding when called may be experiencing a cognitive change—but hearing loss can change that response too.
A dog who hesitates in a familiar hallway may be disoriented—but vision, pain, weakness, or difficulty with the flooring can also affect how confidently they move through that space.
A dog who begins having accidents indoors may have lost part of a familiar routine—but urinary problems, increased urine production, gastrointestinal trouble, incontinence, or difficulty reaching the door can also change house-training behavior.
That’s why one behavior rarely gives you the whole answer.
And it’s also why the words you use to describe what happened matter.
“He seemed confused last night” captures your impression, but it leaves out most of what you actually saw.
A note like this is already useful:
“He woke around 1:30 a.m., walked between the bedroom and hallway for about 15 minutes, stopped twice facing the corner, and settled after I took him outside.”
Now you have a time, a behavior, a duration, and what happened afterward. If the same thing happens again, you have something concrete to compare it with.
You still don’t have to decide whether the cause was cognitive change, discomfort, a need to go outside, anxiety, or something else.
You’re simply getting clearer about what happened.
Start with what happened. Let the explanation come later.
THE TIMELINE MATTERS
Did this creep in—or did it appear suddenly?
Sometimes the way a change begins is just as important as the behavior itself.
Changes associated with canine cognitive dysfunction often develop gradually. At first, they can be easy to dismiss—a little more daytime sleeping, an occasional restless night, or a familiar routine that seems slightly less automatic than it used to be.
That’s why it helps to think beyond what happened today.
Try to remember when you first noticed the change. Was your dog doing anything similar several months ago? Did it begin as an occasional behavior and slowly become more frequent? Or does this feel genuinely new?
You may not be able to pinpoint the exact day it started, and that’s fine. Even knowing whether something has been building slowly or appeared abruptly gives your veterinarian useful context.
A dog who has gradually become less certain about moving around after dark presents a different history from a dog who suddenly seems unable to walk normally.
A few restless nights spread over several months are also different from severe disorientation that appears within a matter of hours.
The important point is not that one timeline proves dementia and another rules it out. It’s that sudden change deserves a different level of attention than slow change.
A sudden major change deserves faster attention.
If your dog suddenly collapses, has a first seizure, develops severe weakness, cannot stand or walk normally, becomes markedly unsteady, or appears acutely distressed, do not assume it’s dementia or simply part of aging. Contact your veterinarian promptly.
You don’t need to know what is causing a sudden change before making that call.
Being able to say, “This has been gradually changing for several months,” or “This started very suddenly yesterday,” already gives your veterinarian something useful to work with.
So when something new catches your attention, add one question to the observation:
“When did this really start?”
LOOK AT THE WHOLE DOG
What else changed at the same time?
Behavior rarely happens in isolation.
That matters especially with an older dog, because the behavior that catches your attention may be only one part of a larger change.
Suppose nighttime pacing is what first makes you worry.
It’s easy to focus on the pacing itself. But once you look a little wider, you may notice other things that change the picture.
Perhaps your dog has also started taking longer to stand up or changing sleeping positions repeatedly.
Maybe the water bowl is emptying faster than it used to, or your dog is asking to go outside more often.
Maybe they seem hesitant on stairs, less confident on slick floors, or more easily startled when approached from behind.
Perhaps they’re sleeping much more during the day, eating differently, or having trouble finding a familiar doorway when the house is dark.
None of those observations gives you a diagnosis.
What they do is help you see whether the behavior you noticed belongs to a broader pattern.
A dog who’s restless at night and also drinking more may raise different questions from a dog who’s restless mainly after lying down for several hours.
A dog who seems “confused” mostly after dark may deserve a closer look at vision and navigation.
A dog who hesitates to enter the kitchen may seem uncertain about where they’re going—until you notice that the hesitation begins exactly where the carpet ends and the slick flooring starts.
Those details matter because they help separate what the behavior looks like from what may be contributing to it.
The goal isn’t to choose one explanation before the appointment.
It’s to notice enough of the surrounding pattern that you and your veterinarian have better questions to ask.
You don’t need to monitor every detail of your dog’s day.
Just notice when another change seems to travel alongside the one that first concerned you.
Maybe nighttime waking came first, and increased thirst appeared soon after.
Maybe accidents started around the same time your dog became slower getting to the door.
Maybe the behavior you thought was happening everywhere turns out to happen only in one room, on one type of flooring, or at one time of day.
Those are useful clues.
What changed first? What changed with it? And what still seems completely normal?
SORT THE SIGNAL
The same behavior can have different explanations.
Once you start looking at the pattern, some behaviors become easier to describe—but not necessarily easier to explain.
Several of the changes commonly associated with canine cognitive dysfunction can also appear when an older dog is dealing with pain, sensory loss, mobility problems, illness, or another neurologic condition.
The useful question is not, “Does this behavior prove dementia?”
It’s, “What else could make this same behavior happen?”
Night waking and pacing
Night waking and pacing are good examples.
A dog with cognitive changes may sleep more during the day and become restless or wakeful at night. But nighttime restlessness can also happen when a dog is uncomfortable, needs to urinate more often, has trouble getting settled, or feels less confident moving through a dark house.
What happens during the waking matters. Does your dog pace continuously? Ask to go outside? Pant? Have difficulty lying down? Settle after changing position? Seem uncertain about where to go?
Getting stuck or hesitating in familiar places
Getting stuck or hesitating in familiar places can also look like disorientation.
A dog may stand behind furniture, pause at a doorway, or seem unsure how to move through a space they have known for years.
That can happen with cognitive dysfunction. But vision changes, weakness, pain, slippery flooring, or difficulty turning and backing up can make familiar spaces harder to navigate too.
If your dog struggles mainly in dim light, vision may be worth discussing. If the hesitation begins on slick flooring, mobility or confidence may be part of the picture. If your dog seems lost in many different familiar places regardless of lighting or footing, that’s a different pattern to bring to your veterinarian.
New accidents indoors
New accidents indoors often worry owners because house-training changes are associated with cognitive dysfunction.
But an accident does not automatically mean a dog has forgotten what they learned.
An older dog may be producing more urine, experiencing urgency, leaking while resting, having gastrointestinal trouble, or simply moving too slowly to reach the door in time.
It helps to notice what surrounds the accident.
Was your dog awake or asleep? Did they ask to go outside? Has thirst changed? Are accidents becoming more frequent? Do they happen near the door, or in seemingly random places?
Not responding the way they used to
Not responding the way they used to can be especially unsettling.
A dog who once came immediately when called may seem to ignore you. They may appear less interested in familiar people or slower to react to what is happening around them.
Cognitive change can affect interaction and responsiveness. So can hearing loss, vision changes, pain, fatigue, or illness.
One useful thing to notice is whether the response changes depending on how you get your dog’s attention.
Do they ignore your voice but respond when they see you? Do they startle when touched because they didn’t hear you approach? Do they seem engaged once you are directly in front of them?
Staring or seeming “lost”
Staring or seeming “lost” deserves the same careful description.
There’s a difference between pausing quietly for a few seconds and repeatedly standing in corners, staring at walls, or appearing unable to find a familiar route through the house.
If you can, notice how long the episode lasts and whether your dog responds to their name, movement, or touch while it is happening.
And if an episode is sudden, severe, or accompanied by weakness, collapse, unusual movements, or major loss of balance, it deserves prompt veterinary attention rather than being assumed to be dementia.
Withdrawal, clinginess, or irritability
Withdrawal, clinginess, or irritability can also be difficult to interpret.
Some dogs with cognitive change become more anxious, seek more reassurance, or interact differently with familiar people.
A dog who suddenly dislikes being touched in one area, avoids certain movements, or becomes irritable when getting up may be giving you information about pain rather than memory.
And sometimes the pattern is mixed.
An older dog may have cognitive changes and arthritis. Hearing loss and nighttime anxiety. Vision changes and difficulty navigating the house.
You do not have to force every behavior into one explanation.
The same signal can come from more than one place—and more than one thing can be happening at once.
The goal is to make the pattern clear enough that you and your veterinarian can begin asking better questions.
LOOK FOR A CLUSTER
DISHAA can organize the clues—but it can’t diagnose your dog.
One behavior can be difficult to interpret on its own.
A cluster of changes can tell you more.
That’s the idea behind a framework veterinarians often use when thinking about possible canine cognitive dysfunction. It’s commonly shortened to DISHAA, and it groups behavior changes into several areas rather than treating one symptom as the answer.
The letters stand for:
Disorientation — getting lost in familiar places, staring, getting stuck, or seeming unsure how to move through a space.
Interaction — changes in how a dog responds to familiar people or animals, including becoming more withdrawn, unusually clingy, or less interested in social contact.
Sleep-wake changes — sleeping more during the day, waking frequently at night, pacing, or becoming restless after dark.
House soiling and learning — accidents indoors, changes in familiar routines, or seeming to forget something the dog previously knew.
Activity changes — pacing, wandering, repetitive behavior, or less interest in activities the dog once enjoyed.
Anxiety — new nervousness, increased dependence, restlessness, or distress when left alone.
Seeing several changes across these areas can be more meaningful than seeing one isolated behavior.
DISHAA is useful because it gives you a way to organize what you’re seeing. It doesn’t tell you what’s causing every change.
Its value is in helping you notice whether a change is isolated, spreading into other parts of daily life, or becoming more frequent over time.
The details matter more than the score.
A checklist can help you see the pattern. It cannot tell you why the pattern is there.
MAKE THE CHANGE MEASURABLE
What should you actually write down?
You don’t need a detailed diary of your dog’s whole day.
A few clear observations are usually more useful than trying to record everything.
When something happens, focus on the parts you can describe:
What happened?
What did you actually see or hear?
When did it happen?
Time of day can matter, especially with sleep, pacing, accidents, and confusion.
How long did it last?
A few seconds, several minutes, or much longer?
What happened just before and after?
Did your dog wake from sleep, eat, go outside, struggle to get comfortable, or settle after something changed?
Was anything else different that day?
Appetite, thirst, mobility, bathroom habits, medication or treatment changes, routine, visitors, weather, or activity can sometimes provide useful context.
You don’t need to interpret what the behavior means while you’re recording it.
A note such as:
“Woke at 2:10 a.m., paced between the bedroom and hallway for about 12 minutes, went outside to urinate, then settled.”
is already useful.
If the behavior happens again, you now have something concrete to compare.
Over a few days or weeks, those small notes can help you see whether something is becoming more frequent, happening at the same time, or appearing alongside another change.
That’s often much easier to bring to a veterinary appointment than trying to reconstruct everything from memory.
The goal is not to document every moment. It’s to make the changes that concern you easier to see.
WHEN NOT TO WAIT
Some changes deserve faster attention.
Most of the changes discussed in this article are useful to track over time.
But some situations should not be watched for days to see whether a pattern develops.
A sudden, dramatic change is different from the gradual behavioral shifts more often associated with cognitive dysfunction. For example, vestibular disease can come on very quickly and affect a dog’s balance and coordination, sometimes causing a head tilt, falling or circling, unusual eye movements, or difficulty standing or walking
Contact your veterinarian promptly if your dog suddenly:
collapses or becomes unresponsive
has a first seizure
cannot stand or walk normally
develops marked weakness or severe loss of balance
has a sudden head tilt with abnormal eye movements
seems acutely distressed or dramatically different from their usual self
You do not need to decide whether the problem is neurological, cognitive, painful, or medical before calling.
The important distinction is this:
Gradual changes can often be tracked. Sudden or severe changes deserve faster veterinary attention.
BRING BETTER INFORMATION
You don’t need to arrive with the answer.
If you’re worried about dementia, it can feel as though you should walk into the veterinary appointment already knowing what’s wrong.
You don’t.
What’s more useful is a clear picture of what’s changed.
Tell your veterinarian what you’re seeing, when it started, how often it happens, and whether anything else changed around the same time.
If the behavior is difficult to describe—pacing, getting stuck, unusual movements, or an episode of seeming confused—a short video can sometimes help show what you mean.
It can also help to mention what’s still normal. Is your dog eating normally? Still interested in walks? Navigating most of the house without difficulty? Responding normally at other times?
That context can matter just as much as the behavior that worried you.
You might ask:
Could something other than cognitive dysfunction be contributing to this?
Is there anything you would want to rule out first?
What changes would you like me to keep tracking at home?
You’re not responsible for deciding whether the answer is dementia, pain, sensory loss, another medical problem, or a combination of things.
Your job is simply to bring the clearest picture you can.
Bring the pattern, not the diagnosis.
START WITH WHAT CHANGED
You don’t have to figure it all out today.
If something about your older dog feels different, start with the change that concerns you most.
Notice what happened. Write down what you can. See whether it happens again.
You don’t need a diagnosis before the pattern is useful.
A few clear observations can make it easier to see what’s changing—and give your veterinarian better information to work with.
Want a simple place to keep those observations?
The free Senior Dog Treatment & Behavior Tracker helps you record what changed, when it happened, and what you notice next.
Use it on screen or print a copy—whatever is easiest for you.
This tracker is for recording observations and patterns. It does not diagnose your dog or replace veterinary guidance.