What is a body condition score, and is my pet overweight?
A standardised assessment of body fat, scored by feel and shape rather than by weight — and it is far more useful than the scales, because a healthy weight varies enormously between individuals of the same breed.
The scale. Commonly 1 to 9, where 4 to 5 is ideal, or 1 to 5 where 3 is ideal. Your vet will use one of these consistently.
How to assess it yourself, which takes seconds and is worth doing monthly:
Ribs. You should be able to feel the ribs easily with light pressure, with a thin covering of fat — similar to the feel of the back of your hand. If you must press to find them, the animal is overweight. If they are visually prominent, underweight.
Waist from above. Looking down, there should be a visible narrowing behind the ribs. A straight-sided or bulging outline indicates excess.
Abdominal tuck from the side. The belly should rise up toward the hind legs rather than running level or sagging.
Cats specifically should have a small primordial pouch — a loose flap of skin on the belly — which is normal and is not fat, and is frequently mistaken for it.
Why this matters more than owners assume. Obesity in pets is common and is consistently identified as one of the most significant welfare issues in companion animals. It causes or worsens:
Osteoarthritis and reduced mobility.
Diabetes mellitus, particularly in cats.
Respiratory difficulty, compounding problems in flat-faced breeds.
Anaesthetic risk.
Reduced lifespan — studies in dogs have found lean-fed animals living meaningfully longer than their overweight littermates.
Heat intolerance and reduced quality of life.
Why it goes unrecognised. Overweight has become visually normal, so owners calibrate against what they see around them. Surveys consistently find most owners of overweight pets believe their animal is a healthy weight, which is the central obstacle.
What to do: weigh the food rather than estimating, since scoops are wildly inconsistent; count treats as part of the daily allowance, since they are frequently a substantial share; account for other household members feeding; reduce gradually with veterinary guidance; and re-score monthly rather than relying on the scales alone.