Behavior Changes in Aging Cats
As they age, cats often suffer a decline in functioning, including their cognitive functioning. It's estimated that cognitive decline-referred to as feline cognitive dysfunction, or FCD-affects more than 55% of cats aged 11 to 15 years and more than 80% of cats aged 16 to 20 years. Memory, ability to learn, awareness, and sight and hearing perception can all deteriorate in cats affected with FCD. This deterioration can cause disturbances in sleeping patterns, disorientation or reduced activity. It can make cats forget previously learned habits they once knew well, such as the location of the litter box or their food bowls. It can increase their anxiety and tendency to react aggressively. It can also change their social relationships with you and with other pets in your home. Understanding the changes your cat is undergoing can help you compassionately and effectively deal with behavior problems that may arise in her senior years.
Some effects of aging aren't related to cognitive dysfunction. Often these effects can contribute to behavior changes that only look like cognitive decline. Be sure to report all changes you see to your cat's veterinarian. Don't assume that your cat is “just getting old” and nothing can be done to help her. Many changes in behavior are signs of treatable medical disorders, and there are a variety of therapies that can comfort your cat and ease her symptoms, including any pain she might be experiencing.
Cognitive Dysfunction Checklist
The following behaviors may indicate cognitive dysfunction in your senior cat:
Learning and Memory
Confusion / Spatial Disorientation
Relationships / Social Behavior
Anxiety / Increased Irritability
Sleep-Wake Cycles / Reversed Day-Night Schedule
Ruling Out Other Causes for Your Cat's Behavior
If your cat shows any of the symptoms or changes listed above, your first step is to take her to the veterinarian to determine whether there is a specific medical cause for her behavior. Any medical or degenerative illness that causes pain, discomfort or decreased mobility-such as arthritis, dental disease, thyroid dysfunction, cancer, impaired sight or hearing, or urinary tract disease-can lead to increased sensitivity and irritability, increased anxiety about being touched or approached, increased aggression (because your cat may choose to threaten and bite rather than move away), decreased responsiveness to your voice, reduced ability to adapt to change, and reduced ability to get to usual elimination areas.
If medical problems are ruled out, and if primary behavior problems unrelated to aging are ruled out (for example, problems that started years before your cat began aging), your cat's behavior may be attributed to the effects of aging on the brain.