
This is the only filler I will be using. I don't like the idea of my cats accidentally eating kitty litter, which can get upset in their sensitive stomachs, so I avoid sticky varieties. I have two litter boxes and two cats. I would say it does a good job of controlling odor for about 4-5 days without scooping. I can save the pen and/or add some deodorant to extend the life of the pen by a few days before throwing it out and replacing it with new pen. I like that it's really cheap compared to the competition.

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