Over half of cats and dogs in the UK and US are overweight or obese. Companion animal obesity causes chronic pain, reduces mobility, and shortens lifespan — making it one of the most significant preventable welfare problems.
Companion animal obesity is a welfare problem driven by owner behaviour — primarily overfeeding and insufficient exercise — often motivated by affection. Pets that beg or show food enthusiasm are rewarded with treats that cumulatively cause harm. The welfare cost is real and measurable: chronic orthopaedic pain, reduced ability to engage in natural behaviour, and shortened life. Vets are often reluctant to raise obesity directly with owners for fear of appearing judgmental. A welfare-centred framing — obesity causes suffering that we can prevent — is more effective than aesthetic or longevity arguments.