I usually just buy whatever clumping litter is on sale. I don't like the pine cat litter, and I've tried the crystals and Corkscrew hated them, he would poop outside the litter box until I changed over the the cluming litter.
I do use the clumping litter , but only for the $$$$$ . With so many cats it can make a difference . But I startet to buy some other protucts , pine and the pearls(sp) . I am starting to mix them first and later on will have them by them self . But may not be able with so many cats to buy only the other kind of litter . If that make sence to you .
I have used Tidy cats clumping litter for multiple cats ever since we first got Twig and that was four years ago and he's healthy as a horse! so are my other three.That's good enough for me.
When I got my first cat, I went to the pet store and don't know what litter to get. This woman came in and took the last few bags of swheat scoop - she told me that she tried all brands and this is the best since its all natural and has excellent oder control.
Although I can't say I tried all brands, but I am happy with swheat scoop ever since...