Feline cognitive dysfunction: home care for the senior cat

Tobia was sixteen when his owner, Carla, called me in the late autumn. He had started standing in the bathroom at two in the morning, yowling at the wall. He was using the litter box about half the time. He had been, for most of his life, the calmest cat in a three-cat household — patient with the kitten, tolerant of the middle cat. She said, slowly, I think he is getting lost in his own flat.

That sentence is the closest most owners get to naming what is happening. The veterinary term is feline cognitive dysfunction, or FCD. It is a slow decline in the cognitive functions of an older cat, with brain changes very similar to human Alzheimer's. It is not normal aging, and it is not rare: roughly half of cats over fifteen show at least one sign. The signs are quiet, easy to miss, and almost always overlap with medical conditions that, unlike FCD, are often treatable. The job of the first month is to do both things at once.

The DISHAA checklist — what to actually watch for

The veterinary behaviour community has settled on an acronym that is more useful than any list of symptoms: DISHAA. It is not a diagnosis. It is a way of paying honest attention for two weeks, and then bringing the observation to the vet.

• D — Disorientation. Getting stuck in corners, staring at walls, going to the wrong side of a familiar door. Tobia stood facing the bathroom tile for ten minutes at a stretch.

• I — Interaction changes. Withdrawing from a previously social cat, or — less often — becoming more clingy, following the owner room to room, vocalising on sight.

• S — Sleep-wake cycle changes. Sleeping more in the day, restless at night, vocalising after midnight. The 3 a.m. yowl that owners describe as he is doing it for no reason. There is always a reason; the cat has lost the day-night anchor.

• H — House-soiling. Missing the litter box, going just next to it, or — a pattern I see often — going in the same room but on a different surface. The cat is still trying to do the right thing. The map is wrong.

• A — Activity changes. Less interest in play, less grooming, less interest in the window. The cat who used to come running at the sound of the treat bag and now does not, with no other change, fits here.

• A — Anxiety. New fears, new startle responses, new avoidance of being handled. Often the most distressing sign for the family.

The acronym is a memory aid, not a score. A cat with one or two signs has a different conversation ahead than a cat with four. Write down what you see, with dates. A two-week log often changes the diagnosis.

Why the vet visit comes first — the medical overlap

FCD is a diagnosis of exclusion. Almost every DISHAA sign has a medical cause that can look identical, and the medical cause is often the one that responds to treatment.

• Hyperthyroidism is the great mimic. A hyperthyroid cat eats more, loses weight, yowls at night. Many are also cognitively declining. Treating the thyroid often reduces the yowling by half, and reveals what is, and is not, the brain.

• Chronic kidney disease (CKD) changes thirst, litter use, energy, and grooming.

• Hypertension, often secondary to CKD or hyperthyroidism, causes disorientation and night vocalisation.

• Osteoarthritis causes litter-box misses — the cat cannot climb into the high-sided box. The fix is a low-entry box, not a brain treatment.

• Pain of any kind, dental or otherwise, can shift sleep, interaction, and appetite. The cat hurts.

• Deafness, vision loss, nasal disease change behaviour in ways that look like confusion.

The minimum workup I ask families to book is a senior panel: bloods (T4, SDMA), urine, blood pressure, a musculoskeletal exam, and a vision and hearing check. None of it exotic. All of it necessary.

A real multi-cat home — how the group adjusts

Carla's flat has three cats. Tobia, sixteen; Mina, eleven, his daughter; and Pirro, four, a rescue who arrived when Tobia was already slowing down. The group had a quiet, well-rehearsed order: Mina in the middle, Pirro at the bottom of the staircase, Tobia on the windowsill or the bed.

The first thing Carla noticed — before the wall-staring, before the litter misses — was that Pirro had started sleeping on Tobia's windowsill. Tobia had stopped going up. He no longer jumped to the bed. He had, without anyone noticing, withdrawn from the vertical territory he had owned for twelve years.

This is the part of senior-cat care that is not in DISHAA, and the part I find most often in multi-cat homes. A cognitively declining cat does not just slow down. He cedes territory, slowly, often without a hiss, and the rest of the group rearranges. The owner who reads this as the older cat being kind is partly right, but is also missing the welfare signal.

Three practical things helped, and they are what we built into Carla's flat over the next month.

• A second, low-effort perch in Tobia's preferred room. A padded stool under the window, at Tobia's new jumping height. He uses it four hours a day. The window is no longer Pirro's.

• A second low-entry litter box on the ground floor. The miss rate dropped from roughly half to almost zero in two weeks. He was not losing the box. He was losing the stairs.

• Predictable meals, twice a day, in the same dish. Cognitively declining cats eat better with a routine that does not require them to remember. The food puzzle is for the four-year-old.

Environmental changes that help (and the evidence behind them)

The evidence for the home environment part of FCD care is older and more solid than the supplement aisle suggests. The modifications below are the ones that consistently move the needle.

Nightlights. A plug-in low-wattage LED in the hallway, the bathroom, and the litter-box room. Cognitively declining cats are often night-blind on top of being disoriented. Tobia's nightlight reduced his 3 a.m. yowling within four nights. Not to zero. To something livable.

Predictable routine. Cats with cognitive decline do worse with novelty. A new piece of furniture, a houseguest, a weekend away can all produce a setback. Keep meal time, play time, the bedtime ritual identical. The cat's day is a map. You are the map's editor.

Easy access. A step to the bed. A litter box on every floor. Ramps to a beloved perch. The senior cat who can no longer jump is not depressed; he is in a flat designed for the cat he was. The flat needs to catch up.

Scent and pheromone continuity. A cognitively declining cat relies more on smell, not less. Avoid heavy cleaning products in the cat's core rooms. A F3 fraction pheromone diffuser in the main room is low-cost, low-risk, and is, in my experience, more useful for senior cats than for any other age group.

Continued gentle enrichment. A wand toy at 6 p.m. A treat under a cup. A short, successful hunt. The brain that is not being used is the brain that is forgetting fastest.

The evidence on diet and supplements — short, honest version

• Antioxidant-enriched diets with omega-3s, B vitamins, and arginine have, in two well-cited trials (the Purina CNM Cognition line and the Hill's b/d work), produced measurable improvement in a subset of senior cats — most often in disorientation and activity. Not in every cat. Worth trying, with the vet's input, for eight to twelve weeks before judging.

• SAMe has reasonable evidence as neuroprotective support, with a small benefit in some senior cats. Discuss dosing with the vet.

• MCT oil has emerging, early evidence in cats. Promising. Not yet a recommendation.

• Selegiline is licensed in some countries for canine CDS. Off-label use in cats exists. Not a starting point.

The honest summary: diet and supplements are an adjunct, not a treatment. A cat whose nights are not darkened, whose litter is reachable, whose day is predictable, often improves by a meaningful amount before any supplement is on board.

A two-week starter plan for the senior cat household

The first two weeks are for observation and infrastructure, not for drugs.

Days 1–3 — observe and write down. Notebook. Note any DISHAA sign with the time of day. Note litter use, water, meals, where the cat sleeps.

Day 4 — vet visit. Senior blood panel, urine, blood pressure, musculoskeletal and sensory exam. Bring the log.

Days 5–7 — infrastructure. Add the low-entry litter box on the ground floor. Add the second perch. Add the nightlights. Do not change the food yet.

Days 8–10 — routine and enrichment. Two short, gentle play sessions a day. A predictable meal time. A pheromone diffuser in the main room.

Days 11–14 — diet conversation. With the vet's results in hand, talk through diet and supplement options. Add what is appropriate. Watch for two weeks.

By the end of week two the household has a baseline — a clearer picture of what is FCD, what is medical, what is environmental — and a set of changes already paying off. Tobia's night yowling was down by about 60% at the end of week two. Not zero. Enough for Carla to sleep.

Quality of life — the conversation most families postpone

A small honest section, because the alternative is the kind of confident article that avoids the hard question. FCD is progressive. The plan above is not a cure. It is a way of buying good time. The owner's job, in the second year of the diagnosis, is to keep noticing.

The framework I use with families is the HHHHHMM scale, useful as a monthly check-in: Hurt, Hunger, Hydration, Hygiene, Happiness, Mobility, More good days than bad. Score honestly. The conversation is a quiet monthly review, with the vet, with the family, with the cat's own body language.

The deepest part of senior-cat care is the willingness to keep paying attention when the cat can no longer perform the behaviours that used to get attention. The cat who stops coming to the kitchen at treat time is not refusing the relationship. The cat is asking the owner to bring the treat closer, more often.

A small closing thought, on the cat who started it

Carla called me, eight months later, on a Tuesday morning. Tobia had died in his sleep that weekend, on the windowsill — not the high one, the new one — in the late morning sun. She said, I am grateful we did the second perch. I am too. He used it for eight months, with a view of the street and a route back to the bed that did not require jumping. The flat, in the end, was a kind of slow kindness. That is most of what good senior-cat care is.