Thread: what's the best kitty litter?

Oh, as LilyC alluded to above; for many cats do not just change the litter over but either slowly mix them over a period of a couple of weeks steadily increasing the amount of the new litter and/or provide two litter boxes, one with the old litter and the other with the new with a little old litter mixed in for "smell". Else some of our little loves will get confused and stressed...