There was a night, about eight months before we lost Cooper, when I woke up at 2 a.m. to the sound of him pacing. Not the “I need to go outside” kind of pacing. This was different — slow, aimless, like he’d forgotten where he was going. I got up, took him out, he didn’t go to the bathroom. He just stood in the yard looking at nothing, then walked back inside and stood in the kitchen facing the corner.
I thought he was having a bad night. I didn’t know there was a name for what I was watching.
Canine Cognitive Dysfunction Syndrome — what vets sometimes call doggy dementia — affects an estimated 14–35% of dogs over the age of eight. Some studies suggest the numbers are even higher, especially in dogs over 14. And yet so many of us miss it, or write it off as “just aging,” because the early signs are easy to explain away.
What’s Actually Happening in Their Brain
CCD isn’t exactly the same as Alzheimer’s in humans, but it’s strikingly similar. The brains of affected dogs show accumulation of beta-amyloid plaques — the same protein deposits that characterize human Alzheimer’s. There’s also oxidative damage, reduced brain mass, and disruption in neurotransmitter systems. The result is a gradual decline in memory, learning, perception, and awareness.
It’s progressive. And there’s no cure. But there are things that can slow it, and there are things that can make your dog more comfortable — if you catch it early enough to intervene.
The DISHA Framework: How Vets Screen for CCD
Veterinarians use an acronym called DISHA to categorize the symptoms of Canine Cognitive Dysfunction. Knowing this helped me look back at Cooper’s last year and see what I’d been missing.
- Disorientation: Getting lost in familiar spaces, staring at walls, seeming confused in the yard, walking into furniture.
- Interaction changes: Becoming less interested in family members, not greeting you at the door anymore, or conversely becoming clingier and more anxious.
- Sleep-wake cycle disruption: Sleeping more during the day, restless or awake at night, pacing at odd hours.
- House soiling: Having accidents inside despite being previously reliable, seeming to forget they need to go outside.
- Activity and anxiety changes: Less interest in play, food, or exploration; repetitive behaviors; new or increased anxiety; aimless wandering.
Cooper had at least four of these. I noticed them individually and explained each one away. The nighttime pacing was “maybe he’s uncomfortable from the cancer.” The house accidents were “he must have had an upset stomach.” The way he’d stand at the back door without signaling — I thought he was just being weird.
The pattern was there. I wasn’t looking for it as a pattern.
Signs That Are Easy to Miss or Explain Away
Getting stuck in corners or behind furniture
One of the stranger symptoms is dogs walking into a space and then not being able to figure out how to back out or turn around. They stand there, sometimes for minutes. It looks bizarre. It’s actually a classic CCD sign.
Forgetting commands they’ve known for years
If your dog suddenly seems to have forgotten “sit” or doesn’t respond to their name with the same reliability, it’s worth noting. This isn’t stubbornness. Cognitive decline affects learned behaviors.
Changes in vocalization
Some dogs with CCD begin vocalizing more — whining or barking at nothing, especially at night. Others go quieter than usual. Either shift is worth mentioning to your vet.
Reduced grooming or self-care
Dogs groom themselves instinctively. When that behavior decreases, it can indicate they’re simply less aware of or connected to their own body. It’s subtle, but it’s real.
What You Can Do If You Suspect CCD
First: talk to your vet. There’s no single diagnostic test for CCD — it’s largely diagnosed by ruling out other conditions (hypothyroidism, pain, vision loss, and other neurological issues can all mimic CCD symptoms). Your vet will do bloodwork, a physical exam, and likely a behavioral questionnaire.
If CCD is confirmed or suspected, here’s what the current evidence supports:
- Selegiline (Anipryl): The only FDA-approved medication for CCD in dogs. It works by increasing dopamine levels. It doesn’t reverse damage, but it can slow progression and improve quality of life for some dogs.
- Antioxidant-rich diets: Prescription diets like Hill’s b/d are formulated with antioxidants, vitamin E, and C, omega-3s, and L-carnitine — all of which have shown benefit in cognitive studies.
- Mental enrichment: Keeping the brain active matters. Puzzle feeders, new smells, short training sessions with easy wins — these help maintain cognitive function. I keep puzzle toys on hand for Birch starting now, at age two.
- Consistent routine: Dogs with CCD do better with predictability. Same feeding times, same walking routes, minimal rearrangement of furniture.
- Melatonin for sleep disruption: Some vets recommend low-dose melatonin to help reregulate sleep cycles. Ask your vet about dosing for your dog’s weight.
Starting Early Matters More Than You Think
There’s evidence that keeping dogs mentally and physically engaged throughout their lives reduces the risk and severity of CCD. Regular exercise, social interaction, enrichment activities — these aren’t just nice-to-haves. They’re brain health. That’s why Birch goes on sniff walks (not just brisk walks — I let him follow his nose) and gets puzzle feeders a few times a week.
I can’t go back and catch what I missed with Cooper. What I can do is make sure I’m paying attention this time — and that you know what to look for, too.
The Takeaway
Doggy dementia is not rare, it’s not inevitable, and it’s not something you just have to accept. If your senior dog is showing changes in behavior — especially sleep disruption, disorientation, house accidents, or reduced social engagement — bring it up with your vet at your next visit. Don’t wait for it to get worse. The earlier you catch it, the more options you have.