Well, Meowma has been very pressed for money lately, and she has to switch from the Feline Pine we were using (scoopable variety), to a much cheaper litter. It was either the litter or the food, and she'd rather have us pooping on junk than eating it. So our economic compromise is that we get to keep eating CORE dry and EVO wet, but we get cheap litter in the box.
Right now we've got the Special Kitty litter in our boxes (temporary), but Meowma wants to know what the cheapest possible litter is that is still somewhat adequate in function. She tried the Purina litter with disastrous results- 3/5 cats stopped using the box (two just used the one box that still had Feline Pine, and the other avoided them altogether because the Feline Pine one was so dirty), and with the pee from the other two, it wouldn't clump and it just broke up. So yeah, Tidy Cats is a no go. But suggesting any other really, /really/ cheap litters you cats know about would be appreciated.
Also, none of us will use pellet litters. Meowma's tried, but they have to be scoopable.