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American Quarter Horse
Calm, versatile
Also known as: quarter horse, aqha
- Adult weight
- 430–550 kg
- Life expectancy
- 25–30 years
- Size
- Large
- Exercise
- High
- Origin
- USA
- Group
- Stock horse
Reference update: · Not veterinary-reviewedNo single breed standard — ranges are typical values for this group.
Health topics to discuss with your vet
- ●HYPP (periodic paralysis) — DNA testBreed-specific association not yet verified.
- ●Polysaccharide storage myopathy (PSSM1)Breed-specific association not yet verified.
- ●HERDA skin disorderBreed-specific association not yet verified.
Not a diagnosis or a complete risk list. A general condition reference explains a disease but does not establish increased risk in this breed or group. Unsourced associations still need verification.
Care tips
- ✓Five-panel genetic test is widely available
- ✓Low-sugar diet for PSSM horses
Calculators for your American Quarter Horse
Sources & review
Reference update 25 October 2026; not an independent veterinary review. Direct breed evidence is identified above. General directories below do not verify every listed health association.
Weight and lifespan are typical ranges for healthy adults from breed standards and veterinary references; individuals vary. Not veterinary advice.