I too had a problem with the back of the cooker when I had my first furkid and she was small enough to get under and around to the back of and then into the inside of the cooker. My hubby and I came up with the solution of getting some metal mesh from a D.I.Y. shop and screwing it onto the back of the cooker useing the existing screws and holes to secure it all in place and yes it works the other four furkids that have arrived by stealth into our home and hearts have never been able to get into the silver lineing that they can see. hope that this helps with your problem. the other problem that has come up on FML was the frightening experience of S.N.D. that is apparently common in ferrets that are safe and secure... Sleeping Not Dead is so frightening for an owner but not harmfull to ferrets and when it happened to me I ended up in tears. I too found my new hob Rollie hanging over the edge of his hammock ,, his one eye was open but glazed..I called him... I prodded him .. there was no responce .. I grabed him and he just fell limply into my hands.... Oh no my husband said .. I think he is dead.. I cradled my little Rollie in my arms and the tears run down my cheeks ....My poor little darling ..dead. With that my poor little dead darling came very close to being murdered as he slowly stretched out.. gave a wide long yawn and opened his eyes fully...I swear that he was laughing at me. according to hubby ..That darn furkid was so deeply asleep that he could have been eaten and not realised that anything was wrong until he popped out the other end. I didn't know what SND was until I got onto my friend Karen ,Who has seven fur kids and she informed me what it was and then reassured me that all was well and that she had had it happen to her twice. We can laugh now , but not then , hope that this will help..... Eggy Annie [Posted in FML issue 3205]