What the DISHAA Checklist Is for Diagnosing Dog Dementia

Your dog stands in the middle of the kitchen at 2 a.m., staring at the wall. That’s the moment a lot of owners start Googling “dog dementia,” and it’s also the moment a lot of vets reach for a checklist rather than a diagnosis right away.

That checklist has a name: DISHAA. It’s not a blood panel, and it won’t hand you a definitive answer on its own. What it does is organize a mess of vague, easy-to-dismiss behaviors into six categories a vet can actually work with.

What DISHAA Stands For

Each letter is a behavioral domain, not a single symptom:

• D — Disorientation. Getting stuck behind furniture, staring at walls, wandering to the wrong side of a door.
• I — social Interactions. Less interest in greeting you, or a sudden clinginess that wasn’t there before.
• S — Sleep-wake cycle changes. Pacing at night, sleeping more in the day.
• **H — House soiling. **Accidents from a dog who was reliably house-trained for years.
• A — Activity level changes. Repetitive pacing, less interest in play, or new anxious behaviors.
• A — Anxiety. New clinginess, vocalizing, or distress that doesn’t map to an obvious trigger.

This is the same behavioral cluster researchers have described for years under names like DISHA and, before that, the broader canine cognitive dysfunction syndrome literature — the “extra A” for anxiety was added later as vets recognized how often it showed up alongside the rest. According to the American Veterinary Medical Association, the condition affects more than half of dogs by age 15, and DISHAA-style screening is meant to catch it well before it’s that advanced.

Why a Checklist and Not a Scan First

Here’s the part that surprises a lot of owners: cognitive dysfunction can’t be diagnosed with an MRI or a blood draw alone. Brain imaging can rule things out — a tumor, a stroke, a structural lesion — but it can’t confirm cognitive dysfunction syndrome by itself. Diagnosis is built on ruling out everything else first, then matching a pattern of behavior against a known framework.

That’s why the checklist comes before the scan, not after it. A vet reviewing a DISHAA-style history is looking for a consistent, progressive pattern of signs across at least a couple of the six domains — not a single odd night.

I’ll be honest about a limitation here: owner-reported checklists carry real subjectivity. Research summarized by the AKC Canine Health Foundation has repeatedly found that most dogs with cognitive decline never get a formal diagnosis, in part because owners chalk the signs up to normal aging, and in part because a fifteen-minute exam room visit doesn’t always surface six months of subtle nighttime pacing. That’s a gap a structured checklist is specifically built to close.

A Case That Shows Why Timing Matters

A twelve-year-old Labrador mix, 68 pounds, came in because her owner mentioned — almost as an afterthought — that she’d started staring at the pantry door at night. Three weeks earlier, that had seemed like nothing. By the time we talked it through in the exam room, the owner had also noticed the dog pacing after dark and occasionally missing the dog door she’d used without issue for a decade. None of those on their own would have triggered a visit. Together, mapped against disorientation, sleep-wake changes, and house soiling, they were enough to start bloodwork and a formal DISHAA-based history rather than write it off as “she’s just getting older.”

Where the Checklist Falls Short

A DISHAA history isn’t the only tool available, and it’s worth knowing its limits. The Canine Cognitive Dysfunction Rating Scale, or CCDR, takes a more data-driven approach: it scores 13 specific behavioral items on a 1-to-5 frequency scale, and a total score above 50 is considered diagnostic when paired with a veterinary exam. In validation testing described on PubMed, the CCDR reached 98.9% diagnostic accuracy against an independent sample. That’s a tighter, more quantified instrument than a qualitative checklist like DISHAA, and some clinics use both — DISHAA to frame the conversation, CCDR to score it.

Neither tool replaces ruling out other causes of the same symptoms. A urinary tract infection can cause house soiling. Arthritis pain can look like reduced activity. Vision loss can look like disorientation. A PMC: narrative review of diagnostic approaches makes the same point: cognitive dysfunction is, functionally, a diagnosis of exclusion, and skipping that exclusion step is the most common way a checklist gets misused.

The Failed Shortcut I See Most Often

A nine-year-old Cavalier King Charles Spaniel’s owner once filled out a DISHAA-style questionnaire at home, printed off a template, and asked me to sign off on a cognitive dysfunction diagnosis at pickup — no exam, no bloodwork. By day 10 of actually working through it properly, we’d found a UTI that explained the house soiling and mild hip arthritis that explained the reduced activity. The disorientation was real, and mild cognitive changes were still part of the picture, but treating the checklist as a stand-alone diagnostic shortcut would have meant missing two treatable problems hiding underneath it. The checklist told us where to look. It didn’t tell us what we’d find.

Where I Actually Land

For owners noticing early signs, my advice is unglamorous: track the specific behaviors by date, not just a vague sense that “something’s off,” and bring that log to the visit. A vet working from six weeks of dated notes — “started pacing at night around week 2, missed the dog door twice by week 4” — can map that against DISHAA domains far more accurately than a memory pulled together in the waiting room. Some owners also ask about supplements aimed at cognitive support; that’s a reasonable question to raise with your vet once other causes are ruled out, but it’s a follow-up conversation, not a substitute for the diagnostic workup itself. For a deeper look at how specific ingredients stack up, our comparison of Apoaequorin vs NAD+ for canine cognitive decline and our breakdown of astaxanthin vs resveratrol for antioxidant support go through what the evidence actually supports.

What Changes My Read on a Case

The edge case that reshapes how I use this checklist is a dog under seven years old showing DISHAA-type signs. Cognitive dysfunction is overwhelmingly a disease of dogs past nine or ten, so a 6-year-old presenting with disorientation and night waking pushes me toward ruling out something else entirely — a metabolic issue, a seizure disorder, or a toxin exposure — before cognitive dysfunction even enters the differential. Age doesn’t disqualify a diagnosis outright, but it changes the order I go looking in.

The Bottom Line

DISHAA is a starting point, not a verdict. It gives you and your vet a shared vocabulary for behaviors that are easy to dismiss individually and hard to ignore together. If you’re noticing two or more of the six domains — disorientation, social withdrawal or clinginess, disrupted sleep, house soiling, activity changes, or new anxiety — the next right step isn’t a supplement aisle. It’s a dated log and an appointment where your vet can rule out the treatable stuff first. If you want to compare how different senior-support products approach the aging brain once a workup is done, our reviews of Boops Pets vs Animal Biosciences and Boops Pets vs Front of the Pack walk through what each brand is actually willing to substantiate.