Is it possible that your cat is ill? It can be tough to tell if your cat’s small changes reflect a health issue. Cats are masters at hiding sickness. This instinct can defend them from predators or other cats that may be a threat in the wild. Even if the only potential threat is a housemate, today’s house cat has the same tendency to avoid vulnerability. Even cats in single-pet houses have a natural instinct to defend themselves.
Another reason cats and many other animals are less likely to express pain or sickness is because they have no emotional attachment to their discomfort. Animals, on the other hand, are more likely to accept pain or illness as the new normal and go on. It’s possible that humans won’t notice their illness until they’re quite unwell.