Senior Cat Care: What Changes After Age 11

A cat becomes a senior at 11, not at seven. The 2021 AAFP/ISFM life-stage guidelines put cats at 7–10 in the mature adult stage, 11–14 as senior and 15-plus as geriatric, and the care that matters changes at each line. From 11 onward the single most useful thing you can do is take the cat to the vet every six months with bloodwork, and weigh it at home every month. Most of what kills senior cats — kidney disease, hyperthyroidism, arthritis, high blood pressure — is manageable for years when it is caught at the first 5% rather than after the cat stops eating.

Twice a year at the vet, and what to ask for

A six-month interval in an 11-year-old cat is roughly three and a half years of human ageing. Every visit should include a full physical exam, weight and body condition score, muscle condition score, and blood pressure — measured with a Doppler or oscillometric cuff, not guessed from the exam. Ask for a complete blood count, a chemistry panel, total T4, and a urinalysis with urine specific gravity; add a urine protein-to-creatinine ratio and SDMA if kidney values are borderline. From 11, dental checks every visit: periodontal disease is present in most cats over eight and is a chronic pain source nobody notices.

Bring a list of what has changed at home — drinking, appetite, jumping, vocalising at night, missing the box — written down, because in the consulting room you will forget half of it.

Weigh monthly: 2% is the threshold

Use a baby scale or a kitchen scale with a box, same time of day, and record it. For a 4.5 kg cat, 90 g is 2% — worth mentioning to the vet. A 5% loss over six months, or any steady downward slope, needs a workup, not a change of food. Also run your hands along the spine and hips monthly: muscle wasting there can happen while the scale stays flat, and it is one of the earliest signs of both arthritis and chronic kidney disease.

The four conditions behind most senior decline

Chronic kidney disease affects a large share of cats over 15 — estimates run from 30% to 50% depending on the study and how it is diagnosed — and it is silent until roughly two-thirds of kidney function is gone. Hyperthyroidism shows up as weight loss with a good or ravenous appetite, sometimes with night yowling and a scruffy coat; a T4 test finds it years earlier. Osteoarthritis is visible on radiographs in around 90% of cats over 12, and the behavioural signs are easy to miss: jumping onto lower surfaces, hesitating before a jump, matted fur on the lower back because grooming hurts, urinating outside the box because the entry lip is too high. Hypertension often travels with kidney disease and thyroid disease and can cause sudden blindness from retinal detachment — which is why the cuff matters.

Change the house before you change the food

Swap the litter box for one with a lip no higher than 10 cm, and put one on every floor the cat uses. Add a night light on the route from bed to box. Put a step or a ramp — not a chair — up to the favourite window and the bed; a 30 cm step beats a 60 cm jump. Keep room temperature at 22–24°C and add a heated bed, because old cats lose fat padding and struggle to hold heat. Raise food and water bowls 5–10 cm if the neck is stiff, and put non-slip mats under them.

Feeding in the second half of life

Do not restrict protein on your own. Senior cats need highly digestible animal protein to maintain muscle, and unless your vet has diagnosed kidney disease and set a target, cutting protein accelerates muscle loss. Feed four small meals rather than two large ones, measure the ration, and use wet food to push water intake toward 40–60 ml per kg per day — for a 4.5 kg cat, roughly 180–270 ml including what is in the food. If the cat has dental pain, soften kibble with warm water for a few weeks while treatment is arranged.

Grooming, nails and handling

Brush two to three times a week, daily for longhairs, and check under the tail once a week — senior cats often cannot reach, and dried faeces or matting there is both painful and a fly-strike risk in summer. Trim nails every two weeks instead of every three or four: an old cat scratches less, so the quick advances and the claw can curl into the pad. One minute of gentle handling a day keeps vet visits from turning into a wrestling match.

A five-question quality-of-life check, monthly

Is it eating without help? Grooming itself? Moving without obvious pain? Interested in you and in play? Using the box reliably? Score each from 0 to 3 and write the total down; the trend over months tells you more than any single bad day. When two or more categories slide and stay down despite treatment, that is the conversation to have with your vet — early, while there are still options. For breed-specific ageing patterns, see our breed profiles; for screening schedules, the health section; and the age calculator converts your cat's years into human ones.

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