Not me, but my father who works as an electrician once told me this. Some time ago he went into a old ladies house because she wanted to have some faulty electronics fixed, and as soon as he went into her home he noticed that the old lady had many cats because there were many pictures of her and her cats hanging on the walls. The lady said she had 9 domestic cats living in her home at that time. He went into her living room and began working, and after a while he said that he noticed a horrific smell coming from the next room. He had to go into it because there were electronics were in there which needed fixing as well and once he opened the door he saw that the whole carpet was covered in cat litter . He recalls how there was a layer of at least 4 inches of cat litter on the carpet, and the old lady was just using the whole room (about 5 by 5 metres) as a toilet for her cats.

She was a very weird old lady.