The useful comparison is function, not age
A gray muzzle does not establish brain disease, and a single missed cue does not establish dementia. Ask whether the dog can still complete familiar tasks with reasonable physical and sensory support. A dog who pauses before stairs because the hips hurt has a different problem from a dog who walks to the wrong side of an open door and seems unable to work out the route.
Normal aging and concerning patterns side by side
- Physical slowing: takes longer to rise but remains oriented to the destination
- Sensory change: responds when a visual cue replaces a missed verbal cue
- Possible disorientation: gets lost in familiar rooms or repeatedly trapped in open spaces
- Interaction change: consistently withdraws, becomes unusually dependent or fails to recognize familiar routines
- Sleep wake change: new nighttime activity with much more daytime sleep
- Learning or house training change: loses a familiar signal or elimination routine
- Activity or anxiety change: repetitive pacing, staring, vocalizing or new distress without a clear trigger
None of these observations is diagnostic alone. The pattern across categories, its progression and the dog’s function between episodes matter.
DISHAA is an interview framework, not a home test
Veterinary teams often organize history with DISHAA: disorientation, social interaction, sleep wake cycles, house soiling and learning, activity, and anxiety. Owners can use the categories to remember examples. A score or checklist cannot replace examination, and abrupt severe signs are not typical “wait and watch” aging.
Conditions that can look cognitive
Pain can cause withdrawal, irritability, pacing and poor sleep. Hearing or vision loss may cause startle, missed cues and navigation errors. Urinary, hormonal, kidney, liver, cardiovascular, gastrointestinal and neurologic problems can change sleep, elimination or behavior. Medication effects and environmental changes also belong in the history. AAHA recommends history, physical and neurologic examination, biochemical evaluation and urinalysis as part of ruling out other disease.
What to bring to an evaluation
- Dated examples from at least two DISHAA categories
- Videos of naturally occurring navigation or response changes
- Sleep, bathroom, appetite, thirst and mobility trends
- All prescriptions, supplements and recent dose changes
- Whether the change was abrupt, episodic or steadily progressive
This page compares patterns; it does not stage the disease
The purpose here is to decide whether a collection of changes deserves a cognitive evaluation. The stages article answers a later question about functional severity after other causes have been addressed. Keeping comparison and staging separate prevents an owner from assigning a stage before the veterinary workup.
One unusual behavior is a clue, not the comparison
Standing beside a door, staring at a wall or getting stuck has its own focused page because the immediate safety response differs. Cognitive concern rises when several domains change together or a pattern repeats. Use those specific guides to record the event, then return here to compare the wider function.
Sudden is a different category
Emergency assessment is appropriate for sudden blindness, collapse, inability to stand, head pressing, seizure, severe circling, marked unresponsiveness, breathing difficulty or suspected toxin exposure. Cognitive dysfunction is generally assessed as a pattern over time; it should not be used to explain away an abrupt neurologic change.
Progression should be described without forcing every day into a score. Note which familiar tasks changed first, whether support restores the task, and whether good function returns between episodes. That history helps distinguish a stable sensory limitation from a widening pattern across sleep, navigation, interaction and learned behavior, while still leaving diagnosis to the veterinarian.
When canine cognitive dysfunction has been diagnosed, the three stage severity framework describes how much daily function has changed. The stages do not replace the diagnostic work described above.
Ask whether hearing and vision have been assessed recently, because a dog cannot use a cue or navigate a route that is no longer detectable.
See how a single behavior is assessed in staring at a wall, standing on the wrong side of a door and getting stuck behind furniture.