We've used allsorts!
I've never been a fan of the clay based litters, I've never seen one that controls the odour.....as they claim.
Worlds best is great...IF they like it that is!
I think cats prefer something heavier to scrat around in maybe, worlds best is so light compared to clay based or even pellet litters.....thats my theory anyways.
We've been using layer pellets for a few months now, which seem to be working suprisingly well. (so Heidi tells me
)
No tracking, No nasty sweet smell, No problems if kittens eat any and it kind of clumps better too. The pellets don't expand that much and stay together instead of breaking-up unlike wood based pellets..... it just absorbs the pee and sticks itself together, drying to a tidy flat clump in just 5-10 minutes.
Much cleaner than anything else I've seen on the market, and a fraction of the price.
Our trays do get emptied (fully) and bleached every day though..... by the wonderful Heidi
so worlds best/pearls is not an option for us really.