Okay so this happened to me last month in my spare bedroom and I nearly launched my tea across the room lol. Slow, raspy breathing, totally rhythmic, and the cat was staring at the exact same corner as me which honestly made it ten times worse because animals don't lie do they.
My mate reckons it was the heating pipes but our heating was off, so cheers for that theory Karen.
What gets me is it stopped the second I turned my torch on. Like it knew. Has anyone else noticed it happens more at night or is that just us being spooked by teh dark and reading into things? Would love to know if others have caught it on audio because I really want to try recording next time instead of just standing there like a frightened muppet.