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Cognitive & behavioural changes in older dogs
Understand confusion, sleep changes and anxiety without assuming dementia.
What cognitive dysfunction means
Canine cognitive dysfunction is an age-related disorder affecting brain function. Owners may notice disorientation, altered social interaction, disrupted sleep, loss of house training, changed activity or increasing anxiety. Repetitive pacing and seeming trapped in familiar places can occur. These signs do not establish a diagnosis.
Other causes need consideration
Pain, sight or hearing loss, urinary disease, medication effects and other medical problems can change behaviour. Tell your veterinarian about new night waking, accidents indoors or withdrawal. Sudden confusion, seizures, collapse or marked imbalance needs urgent advice rather than being treated as gradual cognitive decline.
Prepare a useful diary
Note sleep and waking times, toileting, appetite, interactions and the circumstances of anxious episodes. Record medicines and supplements. A short safe video may help, but do not provoke the behaviour to capture it. Ask what examination or tests are needed to assess other causes.
Support a predictable day
Keep meals, toilet opportunities and rest broadly consistent. Offer gentle scent activities and familiar cues at a pace your dog enjoys. Avoid punishment for accidents or confusion. Provide a quiet resting area, reduce obstacles and consider night lighting. Your veterinarian can discuss environmental changes, appropriate diets or medicines and how to judge response; there is no single cure or guaranteed supplement.
Continue your care plan
Senior & Ageing Dogs · Keeping my dog healthy · New symptoms: find the right next step
Evidence and review
General information, not diagnosis or an individual treatment plan. Sources include veterinary professional guidance, veterinary charities and relevant regional parasite organisations. Clinical recommendations need individual veterinary interpretation.
About this guidanceReview details and sources
Evidence and review
Reviewed 2 October 2026 · Review sooner if advice, distribution or requirements change.