Cats are biologically programmed to be anxious because they’re both predator and prey on the food chain, which leads to a tendency to be stressed - no cat wants to end up as something else’s dinner, let’s be honest.
Cats get anxious for a range of reasons. But it’s mainly because they’re creatures of habit so they can find changes, both big and small, to their routine and life upsetting. These might be small changes like moving the furniture around or a short bout of illness in them or their family. Or they might be big changes, like moving home, a death, or the addition of a new family member, including another pet.
Changes affect your cat’s world and their sense of security. Any change, however small it seems, can cause anxiety, stress and insecurity. These in turn can cause behavioural changes in your cat, or even illness. It’s important that rather than self-diagnosing your cat as anxious, you take them to the vet if you notice different behaviour or if they seem unwell. This will rule out any underlying health conditions.