You mentioned that your landlord will never understand your having so many cats, then later in the post you said that he never checks. So my gut feeling is that you do have concerns in this regard or you wouldn't have mentioned it. If it states in your lease how many pets you can have and you break the conditions of your lease by having too many cats, your landlord has the legal right to evict you and you certainly don't want that. You asked what else you can do. You can do what Emeraldgreen suggested. At least give it a whirl. You asked for opinions and you got them. Good luck.