Restlessness: Cats become restless before giving birth, frequently seeking quiet, comfortable places to prepare for delivery. They may pace back and forth in the room or circle repeatedly in a particular area.

Nesting behavior: Cats will start looking for suitable birthing places and will exhibit nesting behavior, such as scratching the ground with their paws, tidying up the mat or cardboard box, etc.
Decreased appetite: Some cats may experience a decrease in appetite before giving birth, and may even refuse to eat or drink.