My old cat purrs every evening curled up in the same tight ball, and it has never been because she’s comfortable

My old cat purrs every evening curled up in the same tight ball, and it has never been because she's comfortable

That cozy-looking evening purr from your aging cat might actually be her way of coping with pain. Vets reveal why cats purr when injured, why tight curling matters more than you think, and how osteoarthritis remains dangerously underdiagnosed in senior cats.