I am so glad that he survived but dont understand why the RSPCA wasnt called in earlier when the staff knew he was in there - might have saved the poor little soul a lot of suffering because he must have been in a lot of pain with his poorly ears and tail.
That's what I would have thought, how he managed to survive four weeks I'll never know, it could have easily been a different story for him! Glad he's alright though, maybe if he's someone's missing pet they'll see his picture and be reunited too? Just goes to show how much of a fighting spirit cats have though!