Dementia in Cats Symptoms and treatment

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old cat
Old Cat

Thankfully, due to improvements in veterinary care and nutrition, our feline friends are living much longer than they used to. With our cats living longer, it is important to know the health issues associated with this life stage. One issue is a decline in cognitive abilities as a result of aging changes in the brain. Cognitive functions include the mental processes of perception, awareness, learning, and memory, which allow an individual to acquire information about the environment and decide how to act. This is sometimes referred to as dementia, as in humans, but is more correctly termed cognitive dysfunction syndrome (CDS) in cats.

What Is Cognitive Dysfunction Syndrome?

Cognitive Dysfunction Syndrome in cats (CDS) is a cognitive disease prevalent in cats, directly related to the brain aging, leading to changes in awareness, deficits in learning and memory, and decreased responsiveness to stimuli. It is also known as cognitive dysfunction syndrome (CDS). Alzheimer’s disease and dementia in humans are diseases with comparable symptoms.


CDS is characterized by behavioral changes, however, these changes can also result from other diseases such as renal failure and hyperthyroidism. Behavioral changes can often be dismissed by owners as, “My cat is just getting older.” Many behavior changes are symptoms of medical issues. If you notice any behavior changes in your cat, it is important to take your cat to the vet to get a diagnosis and rule out other diseases. CDS is diagnosed once other illnesses are ruled out.

short-fur brown and black cat close-up photography
short-fur brown and black cat close-up photography

How to Diagnose


is an acronym that is commonly used to remember the most common symptoms associated with CDS and can help veterinarians diagnose it in your cat. Look for the following signs:


Cat appears lost or confused in a familiar environment which can result in your cat becoming trapped in corners or behind furniture, staring at walls or into space, difficulty finding their resources (food, water bowl, perch, or litter box) and may have memory deficits, for example, forgetting they have been fed and repeatedly requesting more food.

Interaction changes:

Social interactions might be altered between the pet and owner or pet and other pets; some pets may appear to be more clingy, while others might be disinterested or even irritable when petted or approached.

white, brown, and black cat on brown wooden table
white, brown, and black cat on brown wooden table

Sleep-wake cycle:

You may notice changes in sleep-wake cycles, your cat used to sleep throughout the night and now wakes up at 4 a.m., abnormal night-time behaviors which can include vocalizing, wandering, pacing, and decreased activity during the day.

House soiling:

Your cat may begin to use the bathroom outside of the litter box.


Increased anxiety, increased irritability, and your cat becoming withdrawn.

orange and white bicolor cat
orange and white bicolor cat

Activity changes:

Decreased exploration and response to things, people, sounds around the house, and decreased grooming or appetite.


Treatment of CDS can be difficult since it cannot be reversed or cured. The goal of treatment is to improve the welfare of the cat by intervention focused on relieving the anxiety, slowing the disease process if possible, and supporting cognitive function. Therapies in the form of dietary change, supplements, medication, and environmental enrichment can help manage cognitive dysfunction syndrome. Your veterinarian will work with you to create a personalized treatment plan to help your cat.

Keep your cats enriched.

We have all heard the saying, use it or lose it, this applies to cats as well. Keeping your cats enriched in the form of exercise, new and interactive toys, and learning new things can lead to increased mental stimulation and an increase in cognitive function.

long-haired white cat yawns on floating shelf
long-haired white cat yawns on floating shelf

Senior-ify your house.

As we age, we change our environment to adapt to our needs, but this is not common for cats. There are a few things you can do to help your cats be more comfortable as they age:

  • All resources should be easily accessible for your cat. Your senior cat should not have to walk up and down a flight of stairs to have access to water, food, perches, and/or litter boxes.
  • Senior cats commonly have difficulty with mobility including jumping due to pain as they age. Setting up a ramp or series of steps that your cats can use can help them to more easily get up on the higher surfaces they are used to, such as windowsills, tables, couches, and countertops.
  • Providing your cats with elevated feeders and water eliminates the need to lift the head while eating or drinking.
  • Adding nightlights in the basement, dark hallways, and other areas will help the cats see and easily locate their resources as they age.
  • Provide various resting places including a heated bed, but make sure your cat is still mobile enough to be able to move away from it. Provide some non-heated options as well.
  • Create litter boxes that are large enough for your cat and have a low entrance.

Consistency and Predictability

Consistency and predictability are important for all of us, including cats. Do your best to maintain a consistent schedule and routine. For example, if you are going out of town, be aware this may not be a big change to you, but it is for your cat. Also, be sure to have your cat sitter feed the cat and have an interactive play session with your cat at the same time you usually do.

orange and white cat on brown grass field during daytime
orange and white cat on brown grass field during daytime
black and white cat lying on brown textile
black and white cat lying on brown textile

As cats age, it is more difficult for them to deal with changes, even positive changes. Remember this when introducing changes to your cat’s schedule and environment, changes should be made gradually at a pace your cat is comfortable with.

Can a cat with CDS have a good quality of life? In most cases, yes, but it’s important to recognize that your cat’s needs have changed. Once you understand the changes that accompany aging and work with your veterinarian to manage them, your cat’s senior years can be rewarding for both of you.