It may be that the cat is in a nervous and cautious state, which is usually caused by the cat being unfamiliar with the current environment. The owner can calm the cat's mood by holding a mat or toy that the cat is familiar with. It is also possible that the cat feels that it is threatened and will use this method to intimidate the other party, while also making a low meow.

Tip:

Cats have a very strong sense of territory. When strange animals or people enter their territory, they will become very cautious and their ears will appear. Turn your back to drive others out of your territory. Under normal circumstances, a cat’s ears are upright. When the cat’s ears sway from side to side, it means that the cat is very curious about the things around it.