My wife and I have 1 cat that is VERY picky about her litter. If any of the other cats have used the clay litter then she will walk away from it and use the restroom somewhere else in the house. In an attempt to find a better solution we ordered Yesterday's New's and found that she would use this litter even if someone else had as well. We have 3 litter boxes in the house and one has been assigned this litter, in the future we may start switching all of them over to it as well.