What Is Dog Dementia? Causes, Symptoms, and More

Dog dementia is a degenerative brain condition that affects aging dogs. Much like dementia in humans, it involves a gradual decline in cognitive abilities, impacting a dog’s memory, awareness, and ability to learn new things, says Penny Coder, DVM, senior veterinarian at Small Door Veterinary in Bethesda, Maryland.

Physically, neurons (brain cells responsible for transmitting information) start to break down and die, which affects the dog’s ability to process information. Over time, the brain may shrink in size due to the loss of neurons, resulting in further cognitive decline.

Dog dementia isn’t considered a medical emergency in the traditional sense, as it progresses slowly over time. However, in advanced stages, the symptoms can worsen to the point where a dog might become severely disoriented, anxious, or even aggressive, which could escalate to an emergency situation because the dog could pose a danger to herself or others.

Dog dementia is progressive, so symptoms typically get worse over time. According to Dr. Coder, common signs of dog dementia include:

• Disorientation or confusion (e.g., getting lost in familiar places)
• Changes in sleeping patterns (e.g., staying awake at night)
• Increased anxiety or restlessness for no apparent reason
• Decreased interaction with family members
• Forgetting previously learned commands or routines
• Potty accidents despite being house-trained
• Repetitive behaviors (e.g., barking, pacing in circles)
• Diminished activity level
• Getting “stuck” behind furniture or in corners
• Difficulty recognizing familiar people or pets
• Loss of appetite or interest in food
• Decreased responsiveness to cues or surroundings

Research on dog dementia is ongoing, and while there’s still a lot to uncover, researchers have learned quite a bit about how aging affects a dog’s brain.

Here are some potential causes and risk factors:

• Aging: The most typical risk factor of dog dementia is age, with cognitive decline becoming more common as a dog gets older. Research shows that a quarter of all dogs develop CCD by 8 years old. Other research shows that the risk of CCD increases by more than half for each year of a dog’s life.
• Degeneration of brain cells: As dogs age, brain cells can start to deteriorate and die, leading to cognitive dysfunction. This primarily affects the cerebral cortex—the part of the brain responsible for learning and memory—and the cerebellum, the area responsible for coordination, Dr. Coder says.
• Oxidative stress: Accumulation of chemical reactions that can cause damage to brain cells, accelerating the aging process and cognitive decline, Dr. Coder explains.
• Plaque buildup in the brain: Like Alzheimer’s in humans, the buildup of amyloid plaques—abnormal clumps of protein—in a dog’s brain can disrupt normal brain function, Dr. Coder says.
• Genetics: “Genetics may play a role, as certain breeds [Chihuahua, Border Collies, and Australian Shepherds] are more predisposed,” Dr. Coder says. One study suggests that pups classified as toy, terrier, and non-sporting breeds may have a higher predisposition.

There is no cure for dog dementia, so treatment aims to slow progression, support cognitive function, and make your pup’s life easier and more comfortable, Dr. Coder says.

Here are some ways to achieve those goals:

Create a Consistent, Yet Engaging Environment

• Stick to a consistent routine for feeding, walks, bathroom breaks, and bedtime. This can help reduce confusion and anxiety.
• Provide your dog with toys, puzzles, and snuffle mats to stimulate their mind.
• Take your dog on sniff walks, where you allow her to smell and explore the surroundings at her own pace. Walking in a new place can also help spark your dog’s mind.
• Don’t move your dog’s bed and food/water bowls. Avoid moving furniture in your home as much as possible.

Make Your Home Dementia-Friendly

• In advanced cases, dogs may lose control of their bladder and bowels. Douglas Mader, MS, DVM, DABVP, DECZM, a veterinary specialist in Big Pine, Florida, suggests placing potty pads near doors and/or putting “doggy diapers” or a “belly band” on your pup to reduce cleanup after accidents.
• Install nightlights to help your dog navigate in low-light conditions.
• If there are certain areas, rooms or stairs that may be dangerous for your dog, block them off with a gate, Dr. Mader suggests.
• When you take your dog into public places, always keep her on a leash. Also, make sure she always has an up-to-date ID tag on her collar.
• Try to use throw rugs in your home, which can give your dog more stability when walking, or a ramp to help them get into the car. Additionally, toe-grips can help provide traction when your dog is walking around the home.

Ask Your Vet About Medications and Supplements

• Your vet may prescribe medications such as Anipryl® (selegiline), which is a monoamine oxidase inhibitor (MAOI) used to treat signs of cognitive dysfunction syndrome in dogs.
• Anti-anxiety medications such as Xanax® (alprazolam) or Prozac® (fluoxetine) can help dogs manage stress and anxiety-related symptoms.
• Adding certain supplements like omega-3 fatty acids, B vitamins, and l-arginine to your dog’s diet can support brain function.

Consider Special Diets for Cognitive Health

• Prescription dog foods like Hill’s® Prescription Diet b/d Brain Aging Care Dry Dog Food and Purina® Pro Plan® Neurocare Dry Dog Food are formulated with high levels of nutrients, like antioxidants and omega-3 fatty acids, which may help boost brain function.

Take Your Dog for Regular Veterinary Check-Ups

• Periodic evaluations with your vet will help track your dog’s response to therapy and adjust as needed.
• For stable dogs, twice-yearly checkups may be sufficient, but if you notice any behavioral changes, contact your vet immediately.