If your older dog has started wandering the house at 2 a.m., staring at walls, or forgetting where the water bowl is — the same bowl that's been in the same spot for years — you might have brushed it off as just old age. Veterinary science has long told a similar story: dogs slow down, they get confused, it happens.
But a landmark shift is underway. This week, the AKC Canine Health Foundation announced the launch of a dedicated Aging research program, committing major resources to understanding the diseases and conditions that affect dogs as they grow older — including a condition that affects more than a quarter of senior dogs but has historically been wildly underdiagnosed. That condition is Canine Cognitive Dysfunction Syndrome, or CCDS. And for the first time, veterinary experts now have a standardized playbook for diagnosing it.
Here's what that means for you and your dog.
What Is Canine Cognitive Dysfunction Syndrome?
CCDS is, in the most honest terms, dementia for dogs. It's caused by similar neurological changes as Alzheimer's disease in humans — amyloid plaques building up in the brain, oxidative damage, disrupted neurotransmitter signaling — and it leads to similar outcomes: confusion, disorientation, personality shifts, and lost abilities that once seemed hardwired.
The numbers are striking. According to peer-reviewed research, roughly 28 percent of dogs aged 11 to 12 years show signs of cognitive dysfunction. By the time a dog reaches 15 to 16 years old, that number climbs to 68 percent. And some studies suggest that dogs as young as eight can begin showing early signs.
The challenge has always been that CCDS is notoriously difficult to diagnose. There's no blood test, no brain scan that definitively confirms it. For decades, vets have relied on clinical observation and owner reports — and even then, there was no agreed-upon standard for what "diagnosable" looked like. Many dogs spent their final years being told they were just getting old, when they were actually experiencing a treatable medical condition.
What Just Changed — and Why It Matters
In December 2025, veterinary researchers published the first-ever consensus guidelines for diagnosing and monitoring CCDS in the Journal of the American Veterinary Medical Association — a milestone more than a decade in the making. This week, the AKC Canine Health Foundation announced it's building on that momentum with a dedicated aging research program, including a major new grant to Dr. Evan MacLean at the University of Arizona's Canine Cognition Center.
Dr. MacLean will lead the Study of IGF-1, Neurocognitive Aging and Longevity — the SIGNAL study — which investigates how a growth hormone called IGF-1 influences cognitive aging in dogs. Interestingly, IGF-1 doesn't just regulate body size. It also plays a role in brain function, and researchers suspect that dogs with higher IGF-1 levels may be better protected against cognitive decline. The study will include 75 medium-sized dogs from the local community and could eventually help scientists better understand cognitive aging in humans as well.
"This is about redefining what it means for dogs to grow older," said Dr. Stephanie Montgomery, CEO of the AKC Canine Health Foundation, "moving from living longer to living better."
For dog owners, that's not just a feel-good quote. It's a signal that the science is finally catching up to what many have long suspected: their dog's behavioral changes aren't random. They're medical. And they deserve a medical response.
The Warning Signs: What CCDS Actually Looks Like
Vets use a framework called DISHAA to track the behavioral signs of cognitive dysfunction. It stands for:
- Disorientation — getting lost in familiar spaces, staring blankly at walls, walking into corners
- altered Interactions — becoming more clingy or, conversely, less interested in family members and other pets
- Sleep-wake cycle disruptions — restlessness at night, sleeping more during the day
- House training lapses — accidents indoors despite years of reliable housetraining
- Activity changes — reduced interest in play, exploration, or greeting you at the door
- Anxiety — new fears, increased vocalization, unexplained distress
No single sign seals the diagnosis. But if you're seeing a cluster — especially the combination of nighttime restlessness, indoor accidents, and that faraway, unfocused look — it's worth a conversation with your vet. Not to confirm your worst fears, but because earlier is almost always better when it comes to managing CCDS.
What Your Vet Can Do Now
With the new consensus guidelines in place, vets now have a clearer, standardized framework for evaluating CCDS. An evaluation typically includes a complete physical and neurological exam, bloodwork to rule out underlying conditions (thyroid disease, pain, and vision or hearing loss can all mimic CCDS symptoms), and a detailed behavioral history from you, the owner.
Your observations matter enormously here. Before your appointment, jot down what you've noticed: when it started, how often it happens, what time of day the behavior occurs, and what seems to trigger it or make it worse. This kind of observational data, structured through the DISHAA framework, is how vets build an accurate picture of your dog's cognitive status over time — and how they track whether any treatment is working.
Treatment: Yes, There Are Real Options
CCDS isn't curable. But it is manageable — and early intervention tends to mean slower progression and a better quality of life for longer.
The only FDA-approved medication specifically for canine cognitive dysfunction is selegiline, a drug that affects dopamine and other neurotransmitters in the brain. Studies suggest it's effective in up to 70 percent of dogs with CCDS. It won't reverse existing damage, but many owners report meaningful improvements in alertness and nighttime behavior.
Diet plays a surprisingly significant role. Veterinary diets enriched with medium-chain triglycerides (MCTs) — an alternative fuel source for the aging brain — have shown real promise in clinical research. In a double-blind clinical trial using an MCT-enriched diet, 88 percent of enrolled dogs with CCDS either improved or stopped progressing over 90 days across all six DISHAA categories. Cornell University's veterinary team specifically recommends Hill's Prescription Diet b/d, Purina Neurocare, and Royal Canin Mature Consult for dogs showing signs of cognitive decline.
Antioxidant-rich diets, omega-3 fatty acids, and supplements like SAMe (S-adenosylmethionine) also appear in the research, though the evidence base is less robust than for MCT diets and selegiline. Work with your vet to find the right combination for your dog's specific needs and health status.
What You Can Do at Home, Starting Tonight
Environmental management is one of the most underrated tools available to owners of dogs with CCDS. Simple changes to your home can dramatically reduce your dog's anxiety and confusion:
- Don't rearrange furniture. Familiarity is a cognitive crutch — a good one. Your dog's mental map of your home is one of their most reliable anchors.
- Add night lights. Hallways, sleeping areas, and routes to the water bowl. CCDS dogs often struggle significantly more in low light.
- Keep everything in the same spot. Food, water, beds, and favorite napping spots should stay consistent.
- Stick to a predictable daily routine. Consistent mealtimes and walk schedules reduce decision-making load on an already-taxed brain.
- Offer short sniff walks. Slower, nose-led exploration provides mental stimulation without physical strain — and sniffing is genuinely calming for dogs.
- Use puzzle feeders and simple nose work games. Gentle cognitive engagement helps maintain neural pathways.
- Add non-slip mats on slippery floors and consider a pet ramp to favorite resting spots. Physical confidence reduces anxiety.
None of this requires a prescription. It just requires paying attention to what your senior dog needs as they move through this stage of life — and adjusting accordingly.
The Bigger Picture
The AKC Canine Health Foundation's new aging research program is a meaningful moment for anyone who loves a senior dog. For too long, cognitive decline in dogs was treated as an inevitable, unaddressable fact of aging. Now, with standardized diagnostic guidelines, growing research investment, and real treatment options, there's a path forward that doesn't end with "just let them age gracefully."
Your dog gave you years of unconditional love, loyalty, and tail wags that could light up a room. The science is finally starting to give you real tools to return the favor — and to make sure those last years are good ones.
Think your senior dog might be showing signs of cognitive decline? Sidewalk Dog is your home base for evidence-based, dog-owner-friendly guidance on everything from puppyhood to navigating the senior years with grace. You've got a community here — and so does your dog.
