As some others have written here, the filter is often pulled out times or rumgezupft it. Since the have made me both on the first day and I was afraid that they take something times in the mouth, has fared join me and the filter is now around in the closet. Perhaps they are indeed in the relationship once bit quieter, then the filter also come off again.
The roof is okay, I think it's not bad to look for the legacies and to have only this relatively small hole ;-) thanks raw feeding smells of excrement here anyway very rarely times. But the door does not work 100% because they "verharkt" sometimes a little to the lower shell, making it even little could be dangerous intended for kittens, if they do not get out there equal. My two have it figured fortunately, that they'll just have to come Doller, however, to get out, but for others really could possibly be a problem.
But what bothers me extremely, is the lower shell. Because with such a big toilet, it is logical that one must purely be more scattered, my Miezis absolutely want the Biokats Fresh, which is really hard. And I as a single ship, each time 20 kg in there so that the two also so can dig properly. If you then cleans the entire loo times, which is a pain, and I have a feeling that the sides have already caved in pretty, making it in turn more difficult to secure the lid to the lower shell. Unfortunately, one has no real grip or something, that would be a lot easier.
Overall I would recommend, the size is now perfect for my and it sticks no longer scattered on the buttocks or legs but the toilet. But my cat makes it now so that he rebels with his front paws on the leading edge - where the door is - and then performed his business while he sticks out his head. Is always fun for me, because if one is watching times :-)
