The scales tell you a number. Body condition scoring tells you whether that number is right for this animal, and it takes about thirty seconds. It is the check that catches slow weight gain, which nobody spots by looking, because you see them every day.
Three questions
Hands on the animal for the first one. It takes half a minute and nothing is sent anywhere.
Run your fingertips flat along their ribs.Flat hand, light pressure — the way you would feel the back of your own hand.
Stand over them and look straight down.From above, at the waist behind the ribcage.
Now crouch and look from the side.The belly line, from the ribcage back to the hind legs.
The nine-point scale
Five is the target. The descriptions below are the WSAVA and AAHA wording, shortened.
1 to 3Under. Ribs, spine and hips visible or easily felt with no fat over them.
4 to 5Ideal. Ribs felt easily under a thin layer, waist from above, tuck from the side.
6 to 7Over. Ribs need pressure to find, waist fading, fat over the lower back.
8 to 9Obese. Ribs not findable, no waist, no tuck, fat on the neck and limbs.
Why the scales are not enough
A number on its own means nothing without a frame. 60 lb is lean on one dog and obese on another of the same breed. Body condition scoring gives you the frame, and it is the reason vets do it at every visit rather than just weighing.
It also catches the thing that weighing misses in practice: slow gain. Two pounds a year on a cat is invisible if you see her every day, and it is a fifth of her body weight in four years.
How to do it properly
Use a flat hand and light pressure on the ribs. Pressing hard finds ribs on almost any animal and tells you nothing.
Do the looking-down part with the animal standing square, not sitting or turning to look at you.
Long coats lie. On a fluffy dog or a longhaired cat, the answer is in your hands, not your eyes.
Score every three months and write it down. The trend is the finding.
Why it is worth thirty seconds
Excess weight is linked to shorter life, arthritis, diabetes in cats, and worse outcomes under anaesthetic. It is also the one health problem on that list you can fix at home for free, and the earlier you catch the drift, the smaller the correction.
Last reviewed October 2026. Written and maintained by Petdeals.io. General care information, not veterinary advice — for a sick animal, call a vet.