- Separation anxiety in cats is an emotional response triggered by the separation from a person or companion pet that a cat has a strong bond with. This condition may lead some cats to get agitated and cry when left alone.
Newer studies have shown that some cats crave human social contact just as much as dogs might. The bond between a cat and their caregiver can be very strong, and therefore cats sometimes become upset when left alone.
Excessive vocalizing. If your cat howls or meows loudly and persistently as you leave, they are likely feeling some anxiety. Check with a neighbor to see if they hear your cat crying ...

- Cats often cry or meow when they are alone out of boredom. It is more difficult for cats which live with other felines to be bored. Often they can entertain each other and enjoy peace when on their own.
- However, if your cat is always crying when you or your partner leave the room, this may be a result of excessive attachment, where they dont cope when they are not in the presence of their primary caregiver who they have formed an attachment with.

A 7-month-old kitten crying loudly when left alone often signals separation anxiety. Symptoms include vocalization and attempts to escape. Causes may be sudden changes in routine or fear of abandonment.