Separate names with a comma.
I used the Petco brand for a while but found it very dusty with poor odor control. Adding the walnut might help, but I'm not sure I want to keep...
I've actually been using a mix of clay (Special Kitty) and walnut litters. It's been working really well for my kitties.
Walmart brand Special Kitty works as well as any litter I've tried, and is usually one of the cheapest.
Miss Patchwillow "Mine!"