Feline Obesity: Welfare and Management
Feline obesity affects an estimated 40-60% of adult cats in developed countries, making it the most prevalent nutritional disorder in companion cats. Beyond aesthetic concerns, obesity significantly impairs welfare through pain, reduced mobility, and increased disease risk — and its prevalence reflects widespread management failures that owners may not recognise.
Health and Welfare Consequences
Obese cats have dramatically increased risk of: diabetes mellitus (obesity-induced insulin resistance); osteoarthritis (increased joint loading and inflammatory effects of adipose tissue); hepatic lipidosis (if anorexia occurs, obese cats mobilise fat rapidly causing liver failure); lower urinary tract disease; reduced lifespan; and reduced mobility affecting normal grooming, litter tray use, and quality of life.
The welfare impact is not merely future disease risk — obese cats have reduced ability to engage in normal behaviours (climbing, hunting play, self-grooming hindquarters), experience joint pain from carrying excess weight, and show reduced activity and engagement compared to normal-weight cats.
Causes of Feline Obesity
Neutering reduces metabolic rate by approximately 20-30% — a significant contributor to post-neutering weight gain when feeding is not adjusted accordingly. Free-choice dry food feeding allows continuous calorie intake exceeding requirements. Indoor-only lifestyle reduces activity. Highly palatable calorie-dense foods and treats. Owner misperception of normal vs. obese body condition (many owners perceive overweight cats as normal weight).
Safe Weight Loss
Cats must not lose weight rapidly — hepatic lipidosis risk from mobilising fat stores requires controlled weight loss of no more than 0.5-1% of body weight per week. Veterinary assessment should precede any weight loss programme — concurrent disease must be identified and addressed. Weight loss diets that maintain protein while reducing calories prevent muscle loss alongside fat loss.
Feeding measured quantities (using scales, not cup measurements), transitioning to wet food (lower calorie density than dry), feeding multiple small meals, and providing food puzzles that slow eating and increase activity all support safe weight management.