Vets don't judge a dog's weight by the number on the scale — they use the Body Condition Score (BCS), a hands-on assessment of how much fat a dog is carrying. Most vets use a 1–9 scale, where 4–5 is ideal. You can score your own dog at home in under a minute.
The 1–9 body condition scale
| Score | What it means |
|---|---|
| 1–3 | Underweight — ribs, spine and hip bones visible with no fat cover; obvious waist and tuck |
| 4–5 | Ideal — ribs easily felt with a thin fat cover; visible waist from above; belly tucks up from the side |
| 6–7 | Overweight — ribs hard to feel under fat; waist fading; little or no tuck |
| 8–9 | Obese — ribs cannot be felt; no waist; belly rounded or sagging; fat deposits over spine and base of tail |
How to score your dog in 3 checks
- Ribs: run flat hands along the ribcage. Easy to feel under a thin layer = ideal. Have to press = too much fat.
- Waist (from above): look down while your dog stands. A clear narrowing behind the ribs = ideal. Straight or bulging = overweight.
- Tuck (from the side): the belly should rise up behind the ribcage. Level or sagging = overweight.
If two or three checks point to "overweight", your dog is likely a BCS 6–7 or higher. The good news is that BCS responds quickly to modest changes in food and activity.
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Open the weight calculatorFrequently asked
What is a dog body condition score?
It's a vet's hands-on rating of how much fat a dog carries, usually on a 1–9 scale where 4–5 is ideal — more reliable than the scale alone because it accounts for frame and breed.
What BCS should my dog be?
Ideal is 4–5 out of 9: ribs easily felt under a thin layer, a visible waist from above, and a belly that tucks up from the side.
How do I check my dog's body condition at home?
Do three checks — feel the ribs, look for a waist from above, and check the belly tucks up from the side. Two or three pointing to 'overweight' means a high BCS.
Is BCS better than weighing?
They work together. The scale tracks change over time; BCS tells you whether the current weight is actually healthy for that individual dog's frame.