Hello. I have a question and I hope you can help me there. And that’s because lately, when I gave gas or when I was standing there, I have always had such shuffling noises. My friend and I then looked and the top sheet of the cat was so loose that my friend could just take it off. My question now is: Does this sheet have a certain function? Is it harmful for the cat if the sheet would just stay off now? Otherwise my friend would have to build eue mounts, because all four have been broken off.