So we’re attempting to make the change, albeit slowly, from the cat litter we’ve used for years to Yesterday’s News. The last thing we want to do is upset any of our cats, because we will be the ones paying the price when they decide to make an impromptu facility for themselves elsewhere in the house. With one old cat and two adolescents, we have be very careful and slow with this transition. We mixed about 4 cups of the new litter in with the old, and every time I scoop I add a little more. Next litter change we’ll increase the ratio until the new stuff is all we’re using. Since this change isn’t 100% up to us, I’ll have to report back later as to whether we’re still using it. We won’t be pushing it…if they don’t like it, it’s out! So far, so good. I hope it stays that way.