Canine cognitive dysfunction syndrome
Age-related cognitive decline, the dog analogue of dementia.
Cognitive dysfunction syndrome presents as disorientation, altered social interaction, disrupted sleep, house-soiling in a previously trained dog, and reduced activity. It is under-diagnosed because owners often read the early signs as ordinary aging.
How it is measured
Validated owner questionnaires (CADES, CCDR, DISHAA) and, in research settings, laboratory cognitive testing.
Why this matters: canine pain and cognition trials rely heavily on owner-reported scores, and owners who know their dog is being treated tend to report improvement whether or not the drug works. Trials using objective measures such as force-plate gait analysis carry more weight here for exactly that reason.
Interventions, best evidence first
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Moderate evidence diet
Medium-chain triglyceride (MCT) enriched diet
Purina Pro Plan Bright Mind, Hill's b/d
The best-evidenced intervention for canine dementia, and one of the few places where a diet change has randomized trial support. Medium-chain triglycerides give the aging brain an alternative fuel source when its glucose metabolism falters.
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Limited evidence neuro
Selegiline (L-deprenyl)
Anipryl
The only approved drug for canine dementia. Worth trying, particularly for disrupted sleep and lost house-training, but set expectations modestly and pair it with a diet change and enrichment rather than relying on it alone.