Signs of Cognitive Decline in Senior Dogs (and How to Help)
- Ashley Areeda
- Nov 3, 2025
- 4 min read
As our dogs age, they give us so much—love, loyalty, and companionship. This November, in honor of National Senior Pet Month, we celebrate those golden years and everything our older pets bring into our lives. Yet with age come changes—some expected, some less so. One that many pet parents don’t anticipate is cognitive decline, also known as Canine Cognitive Dysfunction Syndrome (CDS). Recognizing the signs early and offering gentle, science-based support can help your dog maintain comfort, connection, and dignity through every season of life.
What Is Canine Cognitive Dysfunction Syndrome?
CDS is a progressive, age-related brain disorder caused by beta-amyloid plaque buildup, oxidative stress, and neuron loss, affecting memory, learning, and awareness (Colombo et al., 2023; Cornell University College of Veterinary Medicine, 2024).In fact, researchers have found that the canine brain ages in patterns strikingly similar to those seen in Alzheimer’s disease in humans (Head, 2013).
Studies show that up to 43% of dogs in their final quarter of life exhibit signs of cognitive decline (Salvin et al., 2011). Age is the leading risk factor, though pain, sensory loss, and metabolic disease often accelerate the progression of symptoms (Feng et al., 2023).
Common Signs to Watch For
Veterinary behaviorists often use the acronym DISHA-A to identify the main symptoms of CDS (Landsberg et al., 2012):
Disorientation – wandering, getting “stuck” in corners, confusion in familiar places.
Interaction changes – becoming clingier, anxious, or withdrawn.
Sleep-wake cycle disruption – nighttime pacing, daytime sleeping.
House-soiling – forgetting previous potty training.
Altered activity – reduced play, restlessness, or new anxiety.
Because these signs can also indicate arthritis, pain, or other health problems, always schedule a veterinary check-up before assuming it’s CDS (Cornell University College of Veterinary Medicine, 2024).
How to Help Your Senior Dog
1. Start with a Veterinary Assessment
A thorough exam helps rule out metabolic, neurological, or pain-related issues that mimic cognitive decline (Colo State VTH, 2022).
2. Provide Routine and Familiarity
Consistency reduces anxiety. Keep feeding, walking, and sleeping schedules predictable. Add night lights or non-slip rugs to make movement easier (PetMD, 2024).
3. Offer Mental & Physical Enrichment
Gentle walks, food puzzles, and scent games boost brain stimulation and circulation (Landsberg et al., 2012).
4. Feed for Brain Health
Diets rich in antioxidants, MCTs, and Omega-3s can improve cognitive performance (Pan et al., 2018). Ask your vet about science-backed senior formulas such as Hill’s b/d or Purina NeuroCare.
5. Consider Veterinary Treatment
The medication selegiline (Anipryl®) may enhance alertness, activity, and sleep (Head, 2013). Pain management and anxiety support, such as the use of medications like gabapentin and trazodone, are equally important for overall comfort.
6. Track Changes Over Time
Keep a journal of behavior patterns and daily mood. Veterinarians often use quality-of-life tools such as the HHHHHMM Scale to guide next steps (Cornell University College of Veterinary Medicine, 2024).
Why Early Detection Matters
Early recognition allows you and your vet to slow progression and adapt your dog’s care plan. Dogs who stay active, maintain a healthy weight, and receive mental stimulation age more gracefully and remain emotionally connected longer (Feng et al., 2023).
Although cognitive decline can’t be fully reversed, love, structure, and science-based care can preserve comfort and peace in your pet’s final years.
Supporting You and Your Senior Pet
Part of loving a senior dog is honoring their changing needs. At Northern Paws Pet Care, we specialize in compassionate, personalized support for every stage — from daily pet care to Pet Loss & Grief Support Sessions that help you navigate anticipatory grief or life after goodbye.
🕊️ The Gift of Peace of Mind.
📚 References
Colo State VTH. (2022). If you have an older pet, be on the lookout for signs of cognitive decline. Colorado State University Veterinary Teaching Hospital. https://vetmedbiosci.colostate.edu/vth/animal-health/if-you-have-an-older-pet-be-on-the-lookout-for-signs-of-cognitive-decline/
Colombo, E., Di Trani, G., & Prato-Previde, E. (2023). Cognitive dysfunction syndrome in aging dogs: A comparative model for Alzheimer’s disease. Animals, 13(13), 2203. https://doi.org/10.3390/ani13132203
Cornell University College of Veterinary Medicine. (2024). Cognitive dysfunction syndrome. Riney Canine Health Center. https://www.vet.cornell.edu/departments-centers-and-institutes/riney-canine-health-center/canine-health-topics/cognitive-dysfunction-syndrome
Feng, Y., Salvin, H. E., & Head, E. (2023). Age, sensory impairment, and cognitive decline in companion dogs. Journal of the American Veterinary Medical Association, 261(11), 1310–1320. https://doi.org/10.2460/javma.23.02.0095
Head, E. (2013). A canine model of human aging and Alzheimer’s disease. Biochimica et Biophysica Acta (BBA) - Molecular Basis of Disease, 1832(9), 1384–1389. https://doi.org/10.1016/j.bbadis.2013.03.016
Landsberg, G. M., Nichol, J., & Araujo, J. A. (2012). Cognitive dysfunction syndrome: A disease of canine and feline brain aging. Veterinary Clinics: Small Animal Practice, 42(4), 749–768. https://doi.org/10.1016/j.cvsm.2012.04.003
Overall, K. L. (2013). Manual of clinical behavioral medicine for dogs and cats. Elsevier.
Pan, Y., Landsberg, G., Mougeot, I., Kelly, S., Xu, H., & Bhatnagar, S. (2018). Efficacy of a therapeutic diet on dogs with signs of cognitive dysfunction syndrome (CDS): A randomized, double-blinded study. Frontiers in Nutrition, 5, 127. https://doi.org/10.3389/fnut.2018.00127
PetMD. (2024). Dog dementia (Canine Cognitive Dysfunction). https://www.petmd.com/dog/conditions/neurological/signs-of-dog-dementia
Salvin, H. E., McGreevy, P. D., Sachdev, P. S., & Valenzuela, M. J. (2011). Underdiagnosis of canine cognitive dysfunction: A cross-sectional survey of older companion dogs. Veterinary Journal, 188(1), 45–50. https://doi.org/10.1016/j.tvjl.2010.03.015
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