Personally I believe the issue will be the Guar Gum binder. Guar Gum can work as a laxative (CITATION) and I think the amount they use is too much for some cats because there isn't any carbs/starch to counteract the laxative impact. therese May possibly 28, 2014 Thanks for this https://winstona186wdj1.bloggadores.com/35314182/getting-my-petstore-to-work