- Decreased activity: A cat that is normally playful and active may suddenly become lethargic and spend most of its time sleeping.
- Loss of appetite: A cat that is sad may lose interest in food and either stop eating altogether or only eat small amounts.
- Hiding or avoiding people: A sad cat may hide under furniture, in closets, or in other dark, enclosed spaces. It may also avoid people altogether or only interact with them briefly before running away.
- Changes in vocalization: A sad cat may meow less than usual or its meows may sound weak or mournful.
- Poor grooming: A sad cat may stop taking care of its appearance and its fur may become matted or dirty.
- Litter box problems: A sad cat may start using the litter box outside the box or stop using it altogether.
- Anti-social behaviour: A sad cat may stop playing with other cats or may start bullying them.
- Increased aggression: A sad cat may become more aggressive than usual, especially towards people or other animals.
- Self-harm: A very depressed cat may start biting or pulling out its own fur or causing itself other injuries.
It is important to remember that not all cats will show all of these signs when they are sad. Additionally, some of these signs can be caused by other medical conditions, so it is important to take your cat to the vet if you are concerned about its health.