Some cats will sleep with face into floor but it could be a sign but most often top of head pressed against wall. If you ever see that then emergency vet immediately but it would be a likely goodbye since that typically indicates a stroke or brain tumor. Accute renal failure is hard to watch. My one at age 16 went into that in 2016 and within a day he looked like like something you'd see on an animal cop show. Thought he was constipated until he stopped drinking. The glazed look is awful. Got the Bombay and the giant after him. Angora grieved hard for over a year.
