Our elderly (16) boy had been losing weight for a while even after being on renal diet food. On Sunday evening he came home after being out all day but wouldn't eat or drink anything. His breathing was very slow (10 breaths per minute). We'd decided to take him to the vet the following morning but stupidly left the cat flap unlocked for our other two. I don't know why we didn't keep him in a room but by the morning he'd gone and haven't seen him since. I'm pretty sure he's gone somewhere to die and him coming home on Sunday was him saying goodbye 😥. I've been out several times since then calling him and looking under bushes but can't find him. I'm just so very sad that we didn't get to be with him at the end.