Cats are considered senior at 11 years and geriatric at 15 or older. The health landscape changes dramatically in these years. Chronic kidney disease, hyperthyroidism, dental disease, and hypertension are all common. Most of these conditions are manageable when caught early.
Most Common Senior Cat Conditions
Chronic kidney disease affects an estimated 30 to 40 percent of cats over 12. Hyperthyroidism is extremely common in cats over 10, causing weight loss despite good appetite. Hypertension often occurs alongside CKD or hyperthyroidism and can cause sudden blindness. Dental disease is nearly universal by age 12.
Hypertension-related retinal detachment can cause sudden blindness in senior cats, often overnight. If your cat suddenly seems disoriented, is bumping into things, or has dilated pupils that do not respond to light, this is an emergency. Blood pressure can be controlled if treated promptly.
- Chronic kidney disease: 30-40% of cats over 12
- Hyperthyroidism: most common endocrine disease in senior cats
- Hypertension: causes sudden blindness, often secondary
- Dental disease: nearly universal, causes hidden pain
- Osteoarthritis: underdiagnosed, cats hide pain effectively
Monitoring at Home
Weigh your senior cat monthly — the kitchen scale works. Unexplained weight loss in a senior cat is always worth investigating. Monitor water intake and litter box output. Changes in litter box habits are often the first sign of kidney disease, diabetes, or hyperthyroidism.
- Monthly weight monitoring: kitchen scale works
- Weight loss: always investigate in senior cats
- Increased thirst and urination: kidney, diabetes, hyperthyroid
- Litter box changes: frequency, volume, effort
- Grooming changes: over- or under-grooming signals illness
Veterinary Care for Seniors
Senior cats benefit from biannual vet visits rather than annual. Senior bloodwork panel catches the most common conditions before symptoms are obvious. Hyperthyroidism treatment options include medication (methimazole), radioactive iodine (most effective, one-time treatment), or prescription diet.
- Biannual visits: earlier detection, better outcomes
- Senior bloodwork: CBC, chemistry, T4, urinalysis, BP
- Hyperthyroidism: methimazole, radioactive iodine, y/d diet
- CKD management: hydration, phosphorus-restricted diet
- Blood pressure monitoring: prevent hypertensive blindness
Evidence-Based Products for Senior Cats
Products with meaningful evidence for the most common senior cat conditions.
Some links are sponsored — our editorial picks are always independent. Disclosure
🐾 Trusted Cat Care Brands We Recommend
Cats have specific nutritional, behavioral, and health needs. Every brand we recommend here has been evaluated for feline-specific quality, safety, and veterinary credibility.
Why These Brands
- Feline-specific formulations
- Value and affordability
- Consistent quality
About this health information
- This guide is general education from the PetCareHall Editorial Team. It is not veterinary advice, and it cannot diagnose or treat your pet. For symptoms, medication or dosing, talk to your veterinarian.
- If your pet is in distress, contact a veterinarian or an emergency hospital now. In the US, poison hotlines are the ASPCA Animal Poison Control Center, (888) 426-4435, and the Pet Poison Helpline, (855) 764-7661. Fees may apply.
- Last updated: March 2026.
- Primary sources we draw on: AVMA pet owner resources, AAHA, WSAVA global guidelines and FDA Animal & Veterinary. See also our sources page.
- Money and recommendations are kept separate. Links marked as sponsored are affiliate links; they do not change what we recommend. Read how we make money and our editorial policy.
Every guide is researched and written by the PetCareHall Editorial Team using AVMA, AAHA and WSAVA guidance and other published sources. We are not a veterinary practice and this is not veterinary advice.
We draw on AVMA, AAHA and WSAVA guidance and other published research, not trends or marketing.
Affiliate relationships never influence recommendations. See our Editorial Policy.