@brokenarmabroad @Alphabet1spaghetti2 Thank you for replying. I will look at Natusan, I don't care about tracking, just getting the right litter as she is a good little cat and is obviously put off by the hard, crunchy stuff.
I forgot to mention, nothing perfumed not just for her but me too. I have noticed a huge amount of perfumed litter for sale and not a lot of natural so it looks as if I am not alone in this.
I use OKO clumping wood (sawdust type) as it used to be softer than it is currently and I bought in bulk on that basis. Previous cats were fine with the pellets. OKO has changed often over the years, sometimes disintegrates into powder, other times is hard and crunchy to the end.
Never liked Worlds Best and I could never see the attraction, first (huge) bag I had stank to high heaven and I avoided it until recently. I don't know what was used at the rescue, I did ask but most of the staff were inexperienced/new due to shortages/funding so the person I saw that day didn't seem to know much about anything and gave a lot of wrong information about other stuff, pointed me to reception and said they sell it there, however it was Worlds Best at the time, they obviously sell what has been donated or is on a deal somewhere.
Worlds Best and other corn litter can contain mites, not to mention spores and heaven knows what else, so if you have a cat with allergies it is not a great choice.
I won't use clay of any kind as it can stick together in the digestive system when licked off paws and cause problems, especially in smaller cats and kittens.
I have seen the colour changing stuff in the past, but not for ages now. Did use silica for one cat, but he didn't care as long as he could dig through the bottom of the tray and out the other side, the dust was unhealthy though.
It looks as if Greenwoods is out, as I have seen something similar that is made of walnut shells, I don't see how that could be soft and if they won't say what it is made of then it seems suspicious to me. Full disclosure is needed for my cats.
Sorry for the length of this post!