The thing with the cat we had just gotten him fixed and he decided that he wasnt going to use the litter box he went right next to it and then went never stepped in it my mom who was in the room cleaned it up right away and we never smelled it my dad is the only one who can still smell it. As for snake poop i have had mine for a little over two weeks 3 this friday and he has yet to go hes urinated and that hasnt smelled.