The obesity epidemic in cats

More than half of UK cats are classified as overweight or obese by veterinary standards. This isn't aesthetic — excess weight is directly linked to diabetes, arthritis, heart disease, and shortened lifespan.

The problem is compounded by a cultural one: many owners perceive a round, well-padded cat as a healthy, well-fed one. The "fat cat" aesthetic has been normalised to the point where owners are often shocked when their vet raises weight concerns.

50%+ of UK cats are classified as overweight or obese by veterinary standards
20–30% reduction in metabolic rate after neutering — most owners don't adjust portions

Body condition scoring

Vets use a 1–9 body condition score (BCS). A healthy cat is typically a 4–5. At 4–5, you should be able to feel the ribs easily but not see them, and there's a visible waist when viewed from above.

  • Too thin (1–3): ribs visible, spine prominent, little muscle mass
  • Ideal (4–5): ribs palpable with slight fat cover, waist visible from above, abdomen tucked
  • Overweight (6–7): ribs difficult to feel, waist absent or barely visible
  • Obese (8–9): ribs not palpable under heavy fat, large abdominal fat pad

The neutering effect

Neutering reduces a cat's metabolic rate by approximately 20–30%. Many owners continue feeding the same amounts post-neutering, leading to gradual weight gain that goes unnoticed over months or years. Switching to a post-neuter food formula — or simply reducing portions — at the time of neutering prevents the majority of weight gain.

The best time to address weight is before it becomes a problem. Cats rarely lose weight easily once it's gained — their metabolism adapts to protect stores.

Safe weight loss

Crash diets are dangerous in cats. Rapid weight loss can trigger hepatic lipidosis — fatty liver disease — which can be fatal. Safe weight loss is 0.5–2% of body weight per week, under veterinary supervision. This typically means a 20–30% reduction in caloric intake over several months.

On adjusting portions: If you are concerned about your cat's weight, your first call should always be your vet. High-protein, grain-free nutrition creates more satiety at lower calorie loads than carbohydrate-heavy alternatives, which makes weight management easier.

The enrichment connection

Boredom and inactivity are as much a cause of weight gain as overfeeding. Indoor cats in under-enriched environments eat out of boredom and move less. Interactive feeders, puzzle toys, and structured play sessions address weight from the activity side — and most cats find them genuinely enjoyable.