When we moved into our house 2 years ago, our cat did not adjust well at all. She hid on a ledge above the basement stairs for almost a week. She did not eat, nor dump out during that time. I know, that was the cleanest her litter box has ever been....lol. No tootsie rolls all week.
After the first week was over, she decided that she is better off owning the place and has been happy ever after.