We are lucky in that our two cats are very placid, they are however quite old and one has taken to having a dump in various places around the house. The weird thing is you know when she's done it before the smel hits you because it is the only time she meows by the door to go out because she knows she will be in trouble. Why she doesn't just meow by the door when she needs a dump I don't know, but I'm not a cat. Ha ha.