How to Test for Canine Cognitive Dysfunction (Checklists)

You test for canine cognitive dysfunction in two steps. First, you score your dog's behaviour at home using a structured owner questionnaire: most commonly the DISHAA assessment tool, the CCDR (Canine Cognitive Dysfunction Rating scale) or CADES (the Canine Dementia Scale). Second, your veterinarian takes that score and runs a physical and neurological exam, bloodwork, urinalysis and blood pressure to rule out the medical problems that produce identical behaviour. There is no blood marker, X-ray or in-clinic scan that confirms cognitive dysfunction in a living dog. The checklist is the test; the veterinary workup is what makes the result mean anything.

That two-part structure is not a formality. Aging dog brains accumulate physical changes, including beta-amyloid deposits that researchers have described as parallel in some ways to those seen in human Alzheimer's disease, but those changes are confirmed on post-mortem tissue, not in the exam room. So the working diagnosis is built from observed behaviour plus the systematic exclusion of everything else. Your job as the owner is to supply the behaviour half with precision instead of impressions.

The six behaviour categories every rating scale is built on

Almost every cognitive screening instrument in use today organises around the same clusters of change, usually remembered by the acronym DISHAA:

• Disorientation, getting stuck behind furniture, standing at the hinge side of a door, staring at walls or into corners, wandering aimlessly, failing to recognise familiar routes or rooms.
• Interactions, changes in how the dog engages with people and other pets: less greeting, less seeking of contact, or the opposite, new clinginess, following you room to room, irritability during handling.
• Sleep-wake cycle, the single sign owners notice first. Night pacing, whining at 3am, panting in the dark, sleeping heavily through the day and becoming restless after sundown.
• House-soiling, learning and memory: accidents indoors from a previously reliable dog, signalling to go out and then forgetting why, loss of trained cues, slower learning of anything new.
• Activity, either decreased purposeful activity (less play, less exploration, more time lying down and not sleeping) or increased repetitive activity such as circling, licking surfaces or pacing a fixed path.
• Anxiety, new separation distress, new noise sensitivity, startling at things the dog used to ignore, restlessness that does not settle.

A good checklist asks you to rate each item by how often it happens and how much it has changed from your dog's own baseline, not against some generic normal dog. That baseline comparison is what turns a vague worry into a usable data point.

A printable checklist you can score before the appointment

Work through this the week before your visit. Score each line as never, occasionally, often or most days, and write the date at the top. If you want a formal printable form, the DISHAA assessment tool is distributed free by the Purina Institute and is widely handed out by veterinary practices as a PDF you can fill in at home; the CCDR and CADES questionnaires are published in the peer-reviewed literature and your clinic can supply the version they prefer to score.

Orientation

• Gets stuck in corners or behind furniture
• Goes to the wrong side of the door, or to a door that no longer leads anywhere
• Stares blankly at walls, floors or nothing in particular
• Seems lost in familiar rooms or in the garden
• Walks past you without appearing to register you

Social interaction

• Greets you less, or stopped greeting you altogether
• No longer seeks petting, or now demands it constantly
• Changed behaviour toward other pets in the home
• Grumbles or flinches when touched in a way that is new

Sleep and night-time

• Awake, pacing or vocalising at night
• Sleeps more during daylight hours than six months ago
• Pants, paces or cannot settle in the evening
• Wakes you repeatedly without needing to go outside

House-training, learning and memory

• Soils indoors despite recent outdoor access
• Asks to go out, then stands there and comes back in
• Forgets cues that were solid for years
• Does not respond to name or to familiar routines
• Cannot find dropped food or a toy in plain sight

Activity level

• Less interest in walks, toys, play or food
• Circles, paces a fixed route, or licks floors and walls
• Starts an activity and abandons it part way through

Anxiety

• New distress when left alone
• New fear of noises, surfaces or being outside after dark
• Trembling or restlessness without an obvious trigger

Tally how many lines you marked as often or most days, and note which category they cluster in. Keep the page. Re-score at each senior check-up so you and your veterinarian are comparing dated snapshots rather than memories: the rate of change over months is often more informative than any single result.

A checklist does not diagnose canine cognitive dysfunction: it gives your veterinarian a structured, dated record of behaviour to weigh against every medical cause that mimics it.

DISHAA, CCDR and CADES: how the main scales compare

Tool	What it is	Format	Best used for
DISHAA	An assessment tool organised around the six behaviour categories above, developed by veterinary behaviour researchers and distributed by the Purina Institute	Printable owner-and-clinician form, each behaviour rated by frequency and severity	First screen, client education, and tracking change between visits
CCDR (Canine Cognitive Dysfunction Rating scale)	A validated owner questionnaire developed by researchers at the University of Sydney	Weighted questions producing a single numerical score with a published cut-off	Screening with a defined threshold; useful where a clear yes/no signal is wanted
CADES (Canine Dementia Scale)	A questionnaire grouped into spatial orientation, social interaction, sleep, wake cycles and house-soiling	Owner-rated items that place the dog into a stage of impairment	Staging severity and following progression over time

All three are owner-reported, which is a strength rather than a weakness: you see your dog across hundreds of hours that no consultation can replicate. Scoring higher on any of them does not confirm cognitive dysfunction, and your veterinarian will interpret the result against the exam and lab findings rather than reading the number alone. Ask which instrument your clinic scores against, and use the same one each time.

What your vet rules out before a score means anything

This is the half owners skip, and it is the half that changes outcomes. A long list of conditions produces night pacing, disorientation, withdrawal and indoor accidents in an older dog:

• Pain, most often osteoarthritis. A dog that cannot settle, paces at night, snaps when handled and stops greeting you may be sore rather than confused. Painful hips make stairs and the back door a problem, which looks exactly like lost house-training.
• Vision and hearing loss. A deaf dog ignores its name. A dog with failing sight bumps into furniture and startles when you appear. Neither is dementia.
• Endocrine and metabolic disease: hypothyroidism, Cushing's disease, diabetes, kidney and liver disease, including hepatic encephalopathy, which causes genuine neurological signs.
• Urinary tract infection or bladder disease behind new indoor accidents.
• Hypertension, which is often silent until it affects vision or the brain.
• Brain tumours, strokes and seizure activity, which can present as circling, staring or sudden behaviour change.
• Medication effects, including sedatives and some pain or behaviour drugs already in use.

Expect a full physical and neurological exam, a complete blood count and chemistry panel, thyroid testing, urinalysis and blood pressure measurement. Imaging may follow if the neurological exam is asymmetric or the onset was abrupt. Where cognitive dysfunction is the conclusion, your veterinarian may discuss a licensed prescription medication, therapeutic diets formulated for brain aging, environmental enrichment and sleep-cycle management. Those are the backbone of the plan, and nothing you add at home replaces them, so talk to your veterinarian before changing anything your dog is already on.

Comfort, mobility and the rest of the senior picture

One practical point gets lost in the dementia conversation: the same dog is usually carrying joint and soft-tissue wear at the same time. Sore hips, a chronic cruciate problem or stiff shoulders feed directly into restlessness, night waking, reduced activity and reluctance to go outside: the exact lines you just scored. Sorting out comfort and mobility makes the behaviour picture cleaner for your veterinarian to read, and it makes daily life better for a dog whose world is already narrowing.

That is where pawgen's K9-REPAIR fits for many owners: a BPC-157 and TB-500 peptide formulation made for dogs, focused on joint, tendon and mobility support through recovery and senior years. BPC-157 is a peptide studied for its role in tissue repair signalling and blood vessel formation; TB-500 relates to thymosin beta-4, studied for cell migration and tissue remodelling. Research into both is emerging and promising, and it is why a growing number of owners add K9-REPAIR to a senior dog's routine alongside the plan their vet has set. BPC-157 and TB-500 are not FDA-approved veterinary drugs and nothing here is a claim about treating cognitive dysfunction or any other condition: the honest framing is mechanism and owner adoption, not outcome promises. What pawgen can state plainly is what is in the bottle: a single, clearly labelled peptide pairing with weight-based guidance, third-party testing with published certificates of analysis, direct-to-door shipping and a 60-day money-back guarantee. That is a different proposition from the underdosed kitchen-sink senior chew with twenty ingredients on the front and no analysis behind any of them.

Key takeaways

• Cognitive dysfunction is diagnosed by exclusion: an owner questionnaire plus a veterinary workup, never a single test.
• DISHAA, the CCDR and CADES all score the same six behaviour clusters; pick one, date it, and re-score it at every senior visit.
• Rate your dog against its own baseline six months ago, not against an imagined normal dog.
• Pain, sensory loss, endocrine disease, hypertension, infection and brain disease mimic dementia and must be ruled out first.
• Mobility and comfort shape night pacing and activity scores more than most owners expect, so treat them as part of the same picture.
• Bring the completed checklist to the appointment; it is the most useful thing you can hand your veterinarian.

Your veterinarian owns the diagnosis and the treatment plan here: the exam, the bloodwork, the decision about prescription medication and diet, and the judgement about what each score actually means for your dog. A checklist makes you a better witness to your own dog's aging, and supplements and peptides operate only in the space that proper veterinary care creates.

For more on what goes into K9-REPAIR, pawgen publishes third-party certificates of analysis at /coas/, lists the full range at /shop/, and covers shipping and availability at /location/.

Owners exploring peptide support for their dog can review K9-REPAIR, BPC-157 + TB-500 formulated for dogs, at https://pawgen.com/. BPC-157 and TB-500 are not FDA-approved veterinary drugs. Nothing in this article treats, cures or prevents any condition; every decision about your dog's care belongs with your veterinarian.