The British Shorthair is a stocky, laid-back, food-loving breed and one of the most obesity-prone cats. Its naturally rounded look makes genuine fat easy to excuse as 'just the breed'.
Ideal weight
| Sex | Ideal range |
|---|---|
| Male | 4.1–7.7 kg (9–17 lb) |
| Female | 3.2–5.4 kg (7–12 lb) |
Chunky by design — but there's a limit. British Shorthairs are built cobby and solid, so owners routinely mistake real fat for breed shape. They're also calm and food-motivated, a classic obesity combination. The test is the same as any cat: findable ribs and a waist mean healthy stocky; buried ribs and a rounded, waistless body mean overweight.
How to tell if your pet is overweight
- Feel for the ribs. Lay both hands flat on the ribcage; you should feel ribs easily under a thin layer without pressing.
- Look from above. There should be a clear waist tucking in behind the ribs; a straight or bulging outline means no waist.
- Check the side profile. The belly should tuck up behind the ribcage rather than hang level.
What to do about it
- Weigh the food, don't scoop it. Eyeballing portions is the most common cause of overfeeding.
- Count treats as calories — keep them under 10% of daily intake; swap biscuits for carrot or green bean.
- Build up daily activity gradually, switching to low-impact options like swimming if joints are sore.
- Go slow with cats. Rapid loss risks fatty liver disease — involve your vet.
- Reweigh monthly. Safe loss is about 1–2% of body weight per week; involve your vet for an overweight pet.
See exactly how overweight — and what that'd be on you
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Open the weight calculatorFrequently asked
How much should a British Shorthair weigh?
Males 4.1–7.7 kg (9–17 lb), females 3.2–5.4 kg (7–12 lb).
Is my British Shorthair fat or just stocky?
Feel for ribs and a waist — stocky-but-healthy still has findable ribs; buried ribs mean fat.
Are British Shorthairs prone to obesity?
Yes — they're calm, food-motivated and among the more obesity-prone breeds.