Pocket VetMaine Coon health guide
Maine Coons are large, gentle, sociable cats. They're generally hardy but predisposed to a heritable heart condition and some joint issues.
Size
Large (4.5–8 kg)
Lifespan
12–15 years
Energy
Moderate
Common health concerns
Hypertrophic cardiomyopathy (HCM)
The most common feline heart disease; Maine Coons have a known genetic form.
Hip dysplasia
Their size predisposes them to joint issues.
Spinal muscular atrophy
An inherited condition affecting some lines.
Dental disease
Routine for many cats; needs monitoring.
Care tips
- ✓Ask about HCM genetic testing and heart screening
- ✓Keep lean to protect joints
- ✓Provide climbing and play for a large, active cat
- ✓Regular dental and wellness checks
Worried about your Maine Coon?
Describe the symptoms (add a photo) and get an instant, calm triage — home care, vet soon, or emergency.
Check my cat nowSigns that need a vet
- ●Fast or laboured breathing, open-mouth breathing — emergency
- ●Sudden hind-leg weakness or pain (possible clot) — emergency
- ●Lethargy or fainting
- ●Limping or reluctance to jump
Frequently asked
Are Maine Coons prone to heart problems?
Yes — they have a known genetic risk for hypertrophic cardiomyopathy (HCM). Screening (genetic test and heart ultrasound) helps detect it early, before signs like laboured breathing appear.
How big do Maine Coons get?
They're one of the largest domestic cats, often 4.5–8 kg, and keep growing until 3–4 years old. Their size makes lean weight and joint care important.
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Pocket Vet editorial team
Written and maintained by the Pocket Vet editorial team using authoritative veterinary sources. Reviewed June 9, 2026. This guide is informational only and not a substitute for professional veterinary care — see our editorial & safety policy. When in doubt, contact your vet; in a true emergency, go to an emergency clinic immediately.
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