If you have mentioned this to the vet, you may want to revisit what advice you may have received. I might try growing some cat grass and finding a healthy cat treat that has some "grassy" ingredients. If you can use clicker training to have them avoid the litter and move on to alternatives, that might help.
+Praying for your blessings+
--- In CatVet@yahoogroups.com, "Brenda" <designweb123@...> wrote:
> We have two cats and one of them (possibly both but definitely one of them) likes to munch on the kitty litter (minus any BM or urine). We use Swheat Scoop.
> What is the best way to get a cat to stop eating the litter and yet still use it for the correct purpose? We thought perhaps she needed some sort of nutritional needs met but have no idea what these may be. We do not want to change to a clay litter that would be worse for her to eat.
> Thank you for any help!