Help! Fearful behaviour in Cats

[Catherine]

I am completely baffled. That seems like strange behavior, even for a cat.

Everything about the room is the same?
You haven't painted it or cleaned it.

Could an animal like a badger or a fox have slipped in and left its scent? You wouldn't be able to see or smell a scent marker. It would have to be a small animal to get in the way the cat does, but it would also need to be a predator.

You would need to clean the room with a special cleaner that uses enzymes to break down animal scents. I have some, but it is a little too far to send it. I got the stuff from a pet store. I am sure there are a number of good products on the market where you are.

I can't think of any other reason for the cat to reject a place she has been using up to now. Her fear seems real so there must be a real reason for it. Is there a chance that some other animal is still visiting her place. If you sprinkle a fine layer of powder(flour would do) you will be able to see any tracks going in an out.
If I think of any other reasons I will let you know.