Yes, cats can get dementia, which is often referred to as feline dementia or cognitive dysfunction syndrome (CDS). Senior cats, especially those over 15 years old, frequently show signs of dementia that resemble human Alzheimer's disease, including memory loss, disorientation, changes in sleep patterns, increased vocalization, and behavioral changes such as forgetting litter box use or routines. This condition involves the buildup of harmful proteins in the brain and subsequent neuron damage, similar to Alzheimer's in humans. Cats develop this condition naturally as they age, making them a valuable model for studying dementia.