I know that baking soda in quantities is harmful. It can be used for indigestion but you have to be careful.....I think it can cause heart problems. I wouldn't put it in the litter without a LOT of research. I do know a lot about it, but just wanted to say I think it should be checked. Ryan and the Fuzzbrats, Fester, Reiko and Nino [Posted in FML issue 2503]