Obesity in cats is one of the most prevalent preventable welfare problems in companion animal medicine. Studies estimate 25-40% of pet cats in Western countries are overweight or obese. Excess body weight causes or exacerbates numerous health conditionsâcreating chronic suffering that is often invisible to owners who perceive overweight cats as healthy or even enviably comfortable.
Diabetes mellitus: Obese cats are 4 times more likely to develop diabetes, requiring daily insulin injections and frequent blood glucose monitoringâa significant burden for both cat and owner. Hepatic lipidosis: If obese cats stop eating (from illness, stress, or anorexia), rapid fat mobilization causes potentially fatal liver failure. Osteoarthritis: Excess weight accelerates joint disease in cats already predisposed to arthritis by age. Lower urinary tract disease: Obesity is a risk factor for feline idiopathic cystitis, a painful and recurrent condition. Reduced lifespan: Obese cats live significantly shorter lives than cats at healthy weight.
Indoor sedentary lifestyles and ad libitum dry food feeding are the primary drivers of feline obesity. Neutering reduces energy requirements by approximately 30%, requiring dietary adjustment that owners frequently fail to make. Free-feeding dry foodâhigh caloric density, low satietyâmakes overeating easy.
Successful feline weight management requires: accurate body condition scoring (not going by weight alone), calorie-controlled wet food diets (higher satiety, lower caloric density), puzzle feeders to slow eating and increase activity, veterinary-supervised weight loss plans, and realistic owner expectations about weight loss timescales (slow and steady).
Part of the Animal Welfare Hub â 2388+ pages of evidence-based animal welfare information.