Dementia in cats is becoming alot more common as cats are living alot longer. I just recently left NYC and the business that I was in had alot of older people that shopped our stores, and most of the ladies had cats. There was one lady that had a cat that she swore was 30 years old, but I talked with several about their older cats and dementia was always brought up.
They had real success stories.
One lady swore that what you needed to do was bright up their life with eating, and gave all of her older cats fish oil, and she had some valid points as omega fatty acids do helps as antioxidants, but she swore that it gave her cats bursts of energy. She also told me that, just like us as we age, our bathroom habits start to change. What she did was simply place several litter boxes around her house, and that made her cats alot more comfortable.
Most dementia habits will happen at night. She also told me she finally got a flashlight and two stuffed mice. When her cats would wake up in the middle of the night, as she described, almost crying, she would take these mice, shine the flashlight on them, kick the stuffed mice a bit, and let the cats chase them. It brought some life and fun back to them, but it also helped to relax them and they would sleep the rest of the night.
But the kicker was the final thing she told me. Feed your cat some yogurt. I have done alot of research on yogurt and pets since then, and she was absolutely correct.
Plain yogart, keep it plain, has enzymes that help to fight fungi and bacteria, but it is especially effective for gas. And older cats get alot of gas, you just may not know it all of the time. Once the gas goes away, you older cat immediately feels better--hope this helps