An older pet who paces at night, soils indoors or seems lost in a familiar room may have cognitive change. They may also have pain, failing hearing, an overactive thyroid or high blood pressure, and several of those are fixable. The order matters: rule out the reversible causes before settling on old age.
What cognitive change actually looks like
Veterinary behaviorists use six categories, which between them cover almost everything owners describe. They are worth knowing because they give you language for the appointment.
Disorientation. Standing in a corner, going to the hinge side of a door, getting stuck behind furniture, staring at a wall, appearing not to recognize a familiar room.
Changed interactions. Less interest in greeting you, or the opposite: new clinginess, following from room to room, or irritability with another pet they have lived with for years.
Sleep-wake reversal. Sleeping heavily through the day and becoming restless in the evening and overnight. This is the one that brings people in, because it is the one that affects the household.
House soiling. Indoors, in a pet who was reliable, often without any apparent awareness of it.
Activity change. Aimless wandering, repetitive pacing, circling, licking at nothing, or the opposite: a marked drop in anything purposeful.
Anxiety. New separation distress, new noise fear, clinging, or an inability to settle even in a quiet room.
It is genuinely common. Published figures put it at roughly a quarter to a third of dogs at eleven to twelve years, rising to around two thirds by fifteen or sixteen. Cats get their own version and are harder to read, because a cat who is disoriented mostly just sleeps somewhere new and yowls at night.
The part that matters more: what else it could be
This is the section to read twice. Every one of the signs above has other causes, and a meaningful share of them are reversible. Settling on dementia without looking is how a fixable problem gets managed as an inevitability for a year.
Pain, most often arthritis. The most common mimic by a wide margin, and far more common in cats than most owners expect: radiographs show joint change in around six in ten cats over six years old, and in up to nine in ten cats over twelve. A dog who cannot get comfortable paces, changes position repeatedly, struggles to settle and gets up repeatedly at night. That looks exactly like restlessness from cognitive change, and it is a different conversation entirely. Older cats hide it better: a cat who has stopped jumping to a favorite spot, or who now takes the furniture route up, is telling you something hurts.
Hearing and vision loss. A pet who cannot hear you approach startles. A pet who cannot see well hesitates at thresholds, misjudges steps and becomes reluctant in the dark. Both look like confusion and neither is confusion.
An overactive thyroid, in cats. Night yowling, restlessness, weight loss despite a strong appetite, a scruffy coat, sometimes vomiting. This is one of the most common causes of a senior cat shouting at 3 AM and it is very manageable once identified.
High blood pressure, in cats. Can cause vocalizing, disorientation and sudden blindness from the retina detaching, and it most often sits alongside a kidney problem, sometimes a thyroid one, and in a minority of cats it stands alone. Worth a reading in any senior cat with a behavior change.
Kidney problems. Increased drinking and urinating, nausea, poor appetite, and a cat who gets up repeatedly at night because they are drinking.
A urinary problem. House soiling in a previously clean pet is a medical question first. A urine sample comes before any discussion of litter boxes or routine.
An overactive adrenal gland, in dogs. Increased drinking, a pot-bellied appearance, thinning coat, panting and restlessness, often at night.
Something inside the head. Less common, and the reason a sudden change, a seizure, circling in one direction, or a new head tilt moves this up the list rather than down it.
During our open hours, come in through our urgent care if the change was sudden, if there has been a seizure, or if your pet is circling, unable to stand or newly blind. Outside our hours any of those should go straight to an open emergency hospital instead, because we are a daytime practice and not a twenty-four hour facility. For the gradual version, our pet diagnostics team runs the bloodwork, urine testing and thyroid panel that sort the reversible causes from cognitive change. A blood pressure reading belongs alongside them and is the step most often skipped in an older cat; it is part of our senior wellness screening. Our medical services team manages what follows, and our nutrition counseling team is worth involving, because what an older pet eats is part of the plan rather than an afterthought.
Why October makes it worse
Night waking tends to get noticeably worse as the days shorten, and there is a plausible reason. The body clock is set largely by light, and an older animal with a degraded clock has less to work with when the light is both dimmer and briefer. The shorter evenings do that work on their own: a pet whose last daylight is at six rather than eight has a weaker signal to set the clock by, and a dim apartment by early evening gives a confused animal very little to orient by.
That points at a practical intervention. Get your pet into bright daylight early rather than late: a morning walk for a dog, or a sunny window perch with the blinds open for a cat. Keep the evening dim and the routine consistent. A pet whose day and night are clearly distinguished does better than one whose day is a uniform gray.
What actually helps at home
- Make the routine rigid. Same meals, same walks, same bedtime, same order. Predictability does more for a confused animal than anything else on this list.
- Do not rearrange the furniture. A pet navigating partly from memory is badly served by a new coffee table. Keep paths clear and consistent.
- Night lights along the route to water, to the litter box, to your bedroom. Cheap and surprisingly effective.
- Fix the footing. Non-slip runners on hard floors, with backing so they cannot slide, because a slip at night makes a nervous animal more nervous. Anything loose is worse than the bare floor.
- More litter boxes, with lower sides. An arthritic cat who has to climb into a high-sided box in another room will stop using it. One on each floor, big, low, uncovered.
- Daytime activity, in small amounts. Short sniffing walks, food puzzles, five-minute training sessions. A mentally occupied day produces a quieter night, and there is reasonable evidence that mental activity slows the progression.
- Do not punish any of it. The soiling, the pacing and the night vocalizing are not deliberate, and punishment adds anxiety to an already anxious animal.
- Keep a diary for two weeks. What time, how long, what it looked like, what you tried. It is far more useful at an appointment than a general impression, and it tells us whether things are changing.
Our hours, and what should not wait for them
We are open 8:30 AM to 7:00 PM Monday through Saturday and 9:00 AM to 7:00 PM on Sunday. Night waking is, by definition, a problem that happens when we are closed, and most of it is a next-day appointment rather than an emergency.
What should not wait: a seizure, collapse, an inability to stand, circling in one direction with a head tilt, sudden blindness, a pet who is straining to urinate and producing little or nothing, or a change that came on over hours rather than months. For any of those overnight, go to an open emergency veterinary hospital and call ahead before you leave. A male cat straining in the box is the most time-critical item on that list and is a matter of hours.
Our guide to how fleas reach an indoor cat covers a different autumn problem, and it is relevant here for one reason: an itchy older cat who cannot settle at night is sometimes just itchy.
Questions we are asked
Is this just old age? He is fourteen.
Age is a risk factor, not a diagnosis, and that distinction is the whole point of this article. Fourteen makes cognitive change more likely and it does not make arthritis, thyroid problems, high blood pressure or kidney problems any less likely, and those are the ones where something can be done. The honest answer is that nobody can tell the difference from the outside, which is why the bloodwork, the urine sample and the blood pressure come first.
My cat has started yowling at 3 AM. Where do I start?
With an appointment, not with a behavior plan, especially if she is over ten. Night vocalizing in a senior cat has a short list of common causes and an overactive thyroid and high blood pressure are both near the top, both are picked up from a blood sample and a series of blood pressure readings, sometimes over more than one visit because a single reading in a stressed cat is not enough to go on, and both are manageable. If everything comes back normal, then we work on the cognitive and environmental side, and you will not have spent three months on routine changes for a problem that was in her bloodstream.
He soils the house at night now. Is he losing control or forgetting?
It could be either and it could be neither, which is why this one always starts with a urine sample. A urinary problem, kidney changes, anything increasing drinking, and arthritis that makes getting outside difficult can all produce exactly this. If those are clear, then house soiling becomes one of the recognized signs of cognitive change, and the approach is more frequent opportunities, better lighting on the route and no punishment.
Does anything slow it down?
Some things help, and expectations should be realistic: the aim is to slow progression and improve quality of life rather than to reverse it. The components with reasonable support are mental enrichment, physical activity within what the joints allow, a consistent environment, keeping them comfortable, and what they eat. Addressing discomfort is the one most often overlooked and it frequently produces the biggest visible improvement, because a lot of what looks like confusion is discomfort.
Should I get a night light or leave the lights on?
Night lights along the specific routes are better than general illumination. You want enough for your pet to find water, the litter box and you, without turning night into day, because a clear difference between day and night is part of what you are trying to reinforce. Pair it with bright daylight in the morning, outdoors for a dog or at a sunny window for a cat.
She paces for an hour every evening and nothing settles her.
Evening restlessness in an older pet is worth having examined properly rather than managed, because that specific pattern is strongly associated with pain. A dog or cat who cannot find a comfortable position is often telling you that lying down hurts. If a physical examination and imaging show arthritis, addressing that frequently resolves the pacing, and owners are often surprised how much of what they had filed as dementia was a sore back.
How do I know if it is getting worse or if I am just noticing more?
Keep the diary. Two weeks of dated notes, with times and durations, turns an impression into something we can compare against the next two weeks. Video helps too, particularly for anything intermittent, because pets reliably decline to demonstrate in the exam room. It also protects you from the opposite error, which is concluding things are deteriorating after one bad night.
Speak to the team at SF Vet Hospital
If your older dog or cat has started pacing at night, soiling indoors, yowling or seeming lost in a familiar room, call us and book an appointment rather than putting it down to age. If the change came on over hours, or there has been a seizure, collapse or sudden blindness, go to an open emergency veterinary hospital and call ahead before you leave.
Published by the team at SF Vet Hospital.
This article is educational in nature and is not a replacement for hands-on assessment of your own pet by a veterinarian.
SF Vet Hospital
2001 Harrison Street, San Francisco, CA 94110
Phone: (415) 907-7576
Email: staff.sfvh@gmail.com
Hours: Monday through Saturday 8:30 AM to 7:00 PM; Sunday 9:00 AM to 7:00 PM