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⚖️ Weight

Pet body-condition tool: cat & dog weight and obesity check

Use the 9-point BCS to judge thin, ideal or overweight, and check the gap between current and target weight.

Body Condition Score (BCS)

Current read
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Look at the waist from above, the abdominal tuck from the side, and gently feel the ribs.

Weight gap check (optional)

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Safe loss is usually 1–2% per week. Have your vet confirm the target.

Why body condition beats the scale

Five kilograms can be overweight for a small cat and underweight for a large one — the number alone says little. Body Condition Score estimates body-fat proportion by touch and sight, the method vets use most for nutritional status, and it suits home self-checks too.

Use three checks: can you feel the ribs easily under a thin fat layer; is there a clear waist when viewed from above; and does the belly tuck up when viewed from the side. Ideal condition (4–5 on the 9-point scale) meets all three. If ribs are hard to feel, the waist is gone and the belly sags, the pet is overweight and needs adjustment.

Obesity sharply raises the risk of joint disease, diabetes, cardiovascular load and anesthetic complications, and shortens life expectancy; being too thin can signal parasites, dental disease or chronic illness. Either way, slow steady adjustment with a vet ruling out underlying causes is safer than rapid change.

Care intensity varies widely by pet — browse all pet profiles for species-specific health notes.

FAQ

What is a Body Condition Score?
BCS is a veterinary 9-point (sometimes 5-point) system that judges body fat by feeling the ribs and looking at the waist and abdominal tuck. It is more reliable than weight alone because ideal weight varies a lot between breeds.
What score is ideal?
On the 9-point scale, 4–5 is ideal: ribs easily felt but not prominent, a visible waist from above, and an abdominal tuck from the side. Below 4 is underweight, above 5 is overweight, and 7+ is obese.
What should I do about overweight?
Do not crash-diet on your own. Confirm a target weight and safe rate with your vet (often 1–2% per week), adjust portions and calories, add activity and re-weigh regularly. Sudden weight change can signal disease and warrants a check-up.

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Last updated: 2026-07-05 · For guidance only — not a substitute for veterinary diagnosis.