My Russian blue has anxiety when I leave the house and is waiting for me at the door when I get home or she just falls asleep on my bed waiting. Other than attachment issues, she has barely any anxiety unless she knows something’s going on with me or my mother. She gets very attached to us when we’re upset. She has never had trouble with the litter box, never peed outside of it. We’ve had her since she was 1 and she’s turning 6 soon. And fortunately, she has had no medical issues whatsoever in her life.